KEYWORDS

• medical ultrasonic electronics
• digital signal processing and its applications to medicine and biology
• development of new diagnostic techniques with ultrasound
• ultrasonic accurate measurement of heart/artery wall vibrations
• measurement of functionality and viscoelasticity of heart wall
• viscoelasticity measurement and tissue characterization of artery wall

RESEARCH PROJECTS

For the following projects, please contact Dr. Kanai

• Transcutaneous Measurement and Spectrum Analysis of Heart Wall Vibrations

We have previously developed a novel ultrasonic method, namely, the phased tracking method, for accurately tracking the movement of the heart wall based on both the phase and magnitude of the demodulated signals to determine the instantaneous position of an object. With this method it is possible to accurately detect small amplitude velocity signal of less than a few micrometers of the heart wall which are superimposed on the motion of the heart wall due to the heart beat. There are several remarkable pulsatile waves during one cardiac cycle in the resultant velocity signals, some of them being commonly obtained for both healthy subjects and patients. These pulsatile waves cannot be recognized in standard echocardiography M-mode images. In this paper, by focusing on one pulsatile wave which occurs around the end-systole, the physiological meaning of these are considered based on various in vivo experiments. The pulsatile wave measured by this novel ultrasonic method will offer potential for quantitative assessment of myocardial viability.

• Noninvasive Evaluation of Local Myocardial Thickening and Its Color-Coded Imaging

For the noninvasive diagnosis of heart disease based on the acoustic characteristics of the heart muscle, we have developed a new method for accurately tracking the movement of the heart wall. By this method, a velocity signal of the heart wall with a small amplitude of less than 10 micrometers on the motion resulting from a heartbeat with large amplitude of 10 mm can be successfully detected with sufficient reproducibility in the frequency range up to several hundred Hertz continuously for periods of about ten heartbeats. In this paper, the method is applied to multiple points preset in the left ventricular (LV) wall along the ultrasonic beam so that the spatial (depth) distributions of the velocity at these points are simultaneously obtained. The motion of the heart wall is divided into the following two components: parallel global motion of the heart wall and the change in myocardial layer thickening at each depth across the LV wall during myocardial contraction relaxation. The latter component is superimposed on the M (motion)-mode image using color to map contraction as red and expansion as blue. By preliminary human studies, the principle of the method proposed in this paper is verified and the frequency band of the components generated by thickening and or thinning in the myocardium is identified. This new approach offers potential for research on noninvasive acoustical diagnosis of myocardial local motility, that is, the myocardial layer function at each depth in the ventricular wall.

• Noninvasive Measurement of Left Ventricular End-Diastolic Pressure and Myocardial Elasticity by Analysis of Small Vibration on Heart Wall

We previously presented a new non-invasive method for measurement of the left ventricular (LV) end-diastolic pressure (EDP) by combining Mirsky's method and the experimentally derived relationship. We determined the eigenfrequency by applying the short-time Fourier transform to the velocity signal from the human heart wall, transcutaneously measured in in vivo by the phased tracking method using ultrasound. The elasticity of the heart wall has been estimated for several human patients.

• Cross-Sectional Imaging of Elasticity of Atherosclerotic Plaque with Transcutaneous Ultrasound

The phased tracking method is unique due to its extremely high spatial and temporal resolution. We have developed a method for showing the cross-sectional image of the elasticity of atherosclerotic plaque with this phase tracking method using transcutaneous ultrasound. This demonstrates the feasibility of measurement of elasticity in cross sectional images. The method is presently being evaluated in various subjects with atherosclerotic plaque.

• In vivo measurement of local pulse wave velocity on arterial wall by detecting and analysing small vibrations for diagnosis of atherosclerosis

Small vibrations were measured simultaneously at two adjacent points on the aortic wall near the aortic valve by electronically alternating the direction of an ultrasonic beam. Transit delay time of the pulse wave between these two points was determined from the two vibration signals obtained by this alternating-beam method. Local pulse-wave velocity traveling two points which are several millimeters apart along the arterial wall was precisely obtained by dividing distance between these points by resultant transit delay time. Such local acoustic properties of the blood vessels should prove useful, especially for noninvasive diagnosis of early stage arteriosclerosis.

RECENT JOURNAL ARTICLES

1. Yasunori Honjo, Hideyuki Hasegawa, and Hiroshi Kanai:
   "二次元収縮弛緩特性計測を目指した心筋運動の高フレームレート計測"
   電子情報通信学会論文誌A　 Vol. J94-A　No. 11, pp. 826-835 (November 2011)


2. Naoto Miura,takashi Watanabe,Satoru Sugimoto,Kazunori Seki,Hiroshi Kanai:
   "Fuzzy FES Controller Using Cycle-to Cycle Contorol for Repetitive Movement Training in Motor Rehabilitation:Experimental Tests with Wireless System"
   Journal of Medical Engineering & Technology　 Vol.1　No.(doi:10.3109/0309902.2011.591480)(September 2011)


3. Hiroki Takahashi, Hideyuki Hasegawa, and Hiroshi Kanai:
   "Automated Identification of the Heart Wall Throughout the Entire Cardiac Cycle Using Optimal Cardiac Phase for Extracted Features"
   Japanese Journal of Applied Physics Vol. 50, No. 7, pp. 07HF16-1-07HF16-9 (July 2011)


4. Atsuhiro Suzuki, Hideyuki Hasegawa, and Hiroshi Kanai:
   "Estimation of the Elevational Distance between Image Planes by Analysis of Ultrasonic Echoes from Point Scatterers"
   Japanese Journal of Applied Physics Vol. 50, No. 7, pp. 07HF09-1-07HF09-7 (July 2011)


5. Kazuki Ikeshita, Hideyuki Hasegawa, and Hiroshi Kanai:
   "Noninvasive Measurement of Transient Change in Viscoelasticity Due to Flow-Mediated Dilation Using Automated Detection of Arterial Wall Boundaries"
   Japanese Journal of Applied Physics Vol. 50, No. 7, pp. 07HF08-1-07HF08-7 (July 2011)


6. Akinlolu Ponnle, Hideyuki Hasegawa, and Hiroshi Kanai:
   "Multi Element Diverging Beam from a Linear Array Transducer for Transverse Cross Sectional Imaging of Carotid Artery: Simulations and Phantom Vessel Validation"
   Japanese Journal of Applied Physics Vol. 50, No. 7, pp. 07HF05-1-07HF05-10 (July 2011)


7. Taku Fukushima, Hideyuki Hasegawa, and Hiroshi Kanai:
   "Estimation of Scatterer Diameter by Normalized Power Spectrum of High-Frequency Ultrasonic RF Echo for Assessment of Red Blood Cell Aggregation"
   Japanese Journal of Applied Physics Vol. 50, No. 7, pp. 07HF02-1-07HF02-8 (July 2011)


8. Hiroshi Kanai and Motonao Tanaka:
   "Minute Mechanical-Excitation Wave-Front Propagation in Human Myocardial Tissue"
   Japanese Journal of Applied Physics Vol. 50, No. 7, pp. 07HA01-1-07HA01-7 (July 2011)


9. Hideyuki Hasegawa and Hiroshi Kanai:
   "High-Frame-Rate Echocardiography Using Diverging Transmit Beams and Parallel Receive Beamforming"
   Journal of Medical Ultrasonics Vol. 38, No. 3, pp. 129-140 (July 2011)


10. Magnus Cinthio, Hideyuki Hasegawa, and Hiroshi Kanai:
    "Initial Phantom Validation of Minute Roughness Measurement Using Phase Tracking for Arterial Wall Diagnosis Non-Invasively In Vivo"
    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Vol. 58, No. 4, pp. 853-857 (April 2011)


11. Hideaki Tagashira, Shenuarin Bhuiyan, Norifumi Shioda, Hideyuki Hasegawa, Hiroshi Kanai, and Kohji Fukunaga:
    "σ1-Receptor Stimulation with Fluvoxamine Ameliorates Transverse Aortic Constriction-Induced Myocardial Hypertrophy and Dysfunction in Mice"
    American Journal of Physiology Heart and Circulatory Physiology Vol. 299, No. 5, pp. 1535-1545 (November 2010)


12. Motonao Tanaka, Tsuguya Sakamoto, Shigeo Sugawara, Hiroyuki Nakajima, Takeyoshi Kameyama, Yoshiaki Katahira, Shigeo Ohtsuki, Hiroshi Kanai:
    "Spiral Systolic Blood Flow in the Ascending Aorta and Aortic Arch Analyzed by Echo-Dynamography"
    Journal of Cardiology Vol. 56, No. 1, pp. 97-110 (July 2010)


13. Yasunori Honjo, Hideyuki Hasegawa, and Hiroshi Kanai:
    "Two-Dimensional Tracking of Heart Wall for Detailed Analysis of Heart Function at High Temporal and Spatial Resolutions"
    Japanese Journal of Applied Physics Vol. 49, No. 7, pp. 07HF14-1-07HF14-9 (July 2010)


14. Tomotaka Sawada, Hideyuki Hasegawa, and Hiroshi Kanai:
    "Line-Focus Array Transducers for Effective Actuation of Tissue"
    Japanese Journal of Applied Physics Vol. 49, No. 7, pp. 07HF10-1-07HF10-6 (July 2010)


15. Feng Han, Ying-Mei Lu, Hideyuki Hasegawa, Hiroshi Kanai, Erika Hachimura, Yasufumi Shirasaki, and Kohji Fukunaga:
    "Inhibition of Dystrophin Breakdown and Endothelial Nitric-Oxide Synthase Uncoupling Accounts for Cytoprotection by 3-[2-[4-(3-Chloro-2-methylphenyl)-1-piperazinyl]ethyl]-5,6-dimethoxy-1-(4-imidazolylmethyl)-1H-indazole Dihydrochloride 3.5 Hydrate (DY-9760e) in Left Ventricular Hypertrophied Mice"
    The Journal of Pharmacology and Experimental Therapeutics Vol. 332, No. 2, pp. 421-428 (February 2010)


16. Hideyuki Hasegawa and Hiroshi Kanai:
    "Phase-Sensitive Lateral Motion Estimator for Measurement of Artery-Wall Displacement Phantom Study"
    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Vol. 56, No. 11, pp. 2450-2462 (November 2009)


17. Toshio Yamagishi, Makoto Kato, Yoshiro Koiwa, Hideyuki Hasegawa and Hiroshi Kanai:
    "Impact of Lifestyle-Related Diseases on Carotid Arterial Wall Elasticity as Evaluated by an Ultrasonic Phased-Tracking Method in Japanese Subjects"
    Journal of Atherosclerosis and Thrombosis Vol. 16, No. 6, pp. 782-791 (November 2009)


18. Hiroki Takahashi, Hideyuki Hasegawa, Hiroshi Kanai:
    "Identification of Heart Wall Based on Coherence among Ultrasonic RF Echoes"
    Japanese Journal of Medical Ultrasonics Vol. 36, No. 6, pp. 679-681 (November 2009)(in Japanese)


19. Ai Tokita, Yasushi Ishigaki, Hisashi Okimoto, Hideyuki Hasegawa, Yoshiro Koiwa, Makoto Kato, Hisamitsu Ishihara, Yoshinori Hinokio, Hideki Katagiri, Hiroshi Kanai, Yoshitomo Oka:
    "Carotid Arterial Elasticity is a Sensitive Atherosclerosis Value Reflecting Visceral Fat Accumulation in Obese subjects"
    Atherosclerosis Vol. 206, pp. 168-172 (September 2009)


20. Toshio Yamagishi, Makoto Kato, Yoshiro Koiwa, Ken Omata, Hideyuki Hasegawa and Hiroshi Kanai:
    "Evaluation of Plaque Stabilization by Fluvastatin with Carotid Intima-Medial Elasticity Measured by a Transcutaneous Ultrasonic-Based Tissue Characterization System"
    Journal of Atherosclerosis and Thrombosis Vol. 16, No. 5, pp. 662-673 (September 2009)


21. Shuumarjav Uurtuya, Kazuhiko Kotani, Nobuyuki Taniguchi, Hiroaki Matsunaga, Hiroshi Kanai, Hideyuki Hasegawa, Kazuomi Kario, Shun Ishibashi, Kouichi Itoh:
    "Relationship between upper Limb Peripheral Artery Stiffness Using the Radial Artery and Atherosclerotic Parameters"
    Journal of Medical Ultrasonics Vol. 36, No. 3, pp. 129-135 (September 2009)


22. Kazuki Ikeshita, Hideyuki Hasegawa, Hiroshi Kanai:
    "Flow-Mediated Change in Viscoelastic Property of Radial Arterial Wall Measured by 22MHz Ultrasound"
    Japanese Journal of Applied Physics Vol. 48, No. 7, pp. 07GJ10-1-07GJ10-5 (July 2009)


23. Nobutaka Saitoh, Hideyuki Hasegawa, Hiroshi Kanai:
    "Estimation of Scatterer Diameter Using Ultrasonic Backscattering Property for Assessment of Red Blood Cell Aggregation"
    Japanese Journal of Applied Physics Vol. 48, No. 7, pp. 07GJ08-1-07GJ08-5 (July 2009)


24. Hiroshi Kanai: "Propagation of Vibration Caused by Electrical Excitation in the Normal Human Heart"
    Ultrasound in Medicine & Biology Vol. 35, No. 6, pp. 936-948 (June 2009)


25. Hideyuki Hasegawa, Michiko Matsuura, Hiroshi Sato, Teruko Yamamoto and Hiroshi Kanai:
    "Imaging of Gaps in Digital Joints by Measurement of Ultrasound Transmission Using a Linear Array"
    Ultrasound in Medicine and Biology Vol. 35, No. 3, pp. 382-394 (March 2009)


26. Hideyuki Hasegawa and Hiroshi Kanai:
    "Simultaneous Imaging of Artery-Wall Strain and Blood Flow by High Frame Rate Acquisition of RF Signals"
    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Vol. 55, No. 12, pp. 2626-2639 (December 2008)


27. Motonao Tanaka, Tsuguya Sakamoto, Shigeo Sugawara, Hiroyuki Nakajima, Yoshiaki Katahira, Shigeo Ohtsuki, Hiroshi Kanai:
    "Blood Flow Structure and Dynamics, and Ejection Mechanism in the Left Ventricle: Analysis Using Echo-Dynamography"
    Journal of Cardiology Vol. 52, No.2, pp. 86-101 (October 2008)


28. Hideyuki Hasegawa and Hiroshi Kanai:
    "Reduction of Influence of Variation in Center Frequencies of RF Echoes on Estimation of Artery-Wall Strain"
    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Vol. 55, No. 9, pp. 1921-1934 (September 2008)


29. Yoshitaka Odagiri, Hideyuki Hasegawa and Hiroshi Kanai:
    "Ultrasonic Measurement of Strain Distribution Inside Object Cyclically Compressed by Dual Acoustic Radiation Force"
    Japanese Journal of Applied Physics Vol. 47, No. 5, pp. 4193-4199 (May 2008)


30. Kentaro Tsuzuki, Hideyuki Hasegawa, Hiroshi Kanai, Masataka Ichiki, and Fumiaki Tezuka:
    "Threshold Setting for Likelihood Function for Elasticity-Based Tissue Classification of Arterial Wall by Evaluating Variance in Measurement of Radial Strain"
    Japanese Journal of Applied Physics Vol. 47, No. 5, pp. 4180-4187 (May 2008)


31. Kazuki Ikeshita, Hideyuki Hasegawa, and Hiroshi Kanai:
    "Ultrasonic Measurement of Transient Change in the Stress-Strain Property of Radial Arterial Wall Caused by Endothelial-Dependent Vasodilation"
    Japanese Journal of Applied Physics Vol. 47, No. 5, pp. 4165-4169 (May 2008)


32. Takaomi Kinugawa, Hideyuki Hasegawa, and Hiroshi Kanai:
    "Automated Segmentation of Heart Wall Using Coherence Among Ultrasonic RF Echoes"
    Japanese Journal of Applied Physics Vol. 47, No. 5, pp. 4155-4164 (May 2008)


33. Kentaro Tsuzuki, Hideyuki Hasegawa, Masataka Ichiki, Fumiaki Tezuka, and Hiroshi Kanai, "Optimal Region-of-Interest Settings for Tissue Characterization Based on Ultrasonic Elasticity Imaging," in Ultrasound in Medicine and Biology Vol. 34, No. 4, pp. 573-585, (April 2008).


34. Hisashi Okimoto, Yasushi Ishigaki, Yoshihiro Koiwa, Yoshinori Hinokio, Takehide Ogihara, Susumu Suzuki, Hideki Katagiri, Takayoshi Ohkubo, Hideyuki Hasegawa, Hiroshi Kanai, Yoshitomo Oka, "A Novel Method for Evaluating Human Carotid Artery Elasticity: Possible Detection of Early Stage Atherosclerosis in Subjects with Type 2 Diabetes," in Atherosclerosis Vol. 196, No. 1, pp. 391-397 (January 2008)


35. Takanori Numata, Hideyuki Hasegawa, Hiroshi Kanai, "Basic Study on Detection of Outer Boundary of Arterial Wall Using Its Longitudinal Motion," in Japanese Journal of Applied Physics Vol. 46, No. 7B, pp. 4900-4907 (July 2007)


36. Teppei Onodera, Hideyuki Hasegawa, Hiroshi Kanai, "Measurement of Angular Dependence of Ultrasonic Scattering from Wire Phantom Mimicking Myocardial Fiber," in Japanese Journal of Applied Physics Vol. 46, No. 7B, pp. 4897-4899 (July 2007)


37. Hiroki Yoshiara, Hideyuki Hasegawa, Hiroshi Kanai, Motonao Tanaka, "Ultrasonic Imaging of Propagation of Contraction and Relaxation in the Heart Walls at High Temporal Resolution," in Japanese Journal of Applied Physics Vol. 46, No. 7B, pp. 4889-4896 (July 2007)


38. Takuya Kaneko, Hideyuki Hasegawa, Hiroshi Kanai, "Ultrasonic Measurement of Change in Elasticity due to Endothelium Dependent Relaxation Response by Accurate Detection of Artery-Wall Boundary," in Japanese Journal of Applied Physics Vol. 46, No. 7B, pp. 4881-4888 (July 2007)


39. Kazuki Kudo, Hideyuki Hasegawa, Hiroshi Kanai, "Measurement of Angular Dependence of Ultrasonic Echo for Estimation of Surface Roughness," in Japanese Journal of Applied Physics Vol. 46, No. 7B, pp. 4873-4880 (July 2007)


40. Yusaku Abe, Hideyuki Hasegawa, Hiroshi Kanai, "Accurate Estimation of Scattering Strength Distribution by Simultaneous Receiving of Ultrasonic Echoes with Multichannel Transducer Array," in Japanese Journal of Applied Physics Vol. 46, No. 7B, pp. 4813-4819 (July 2007)

 
41. Kosuke Ebina, Hideyuki Hasegawa, Hiroshi Kanai, "Investigation of Frequency Characteristics in Cutting of Soft Tissue Using Prototype Ultrasonic Knives," in Japanese Journal of Applied Physics Vol. 46, No. 7B, pp. 4793-4800 (July 2007)

 
42. Hiroki Yoshiara, Hideyuki Hasegawa, Hiroshi Kanai, Motonao Tanaka, "Imaging of Transient in Myocardial Contraction and Relaxation by Measuring Strain Rate at High Temporal Resolution," in Japanese Journal of Medical Ultrasonics Vol. 34, No. 4, pp. 439-448 (July-August 2007)(in Japanese)

 
43. Hideyuki Hasegawa and Hiroshi Kanai, "Tissue Structure of Arterial Wall Revealed with Elasticity Imaging," in Journal of Medical Ultrasonics Vol. 34, No. 1, pp. 73-74 (March 2007)

 
44. Kazuki Kudo, Hideyuki Hasegawa, and Hiroshi Kanai, "Improved Imaging of the Carotid Artery in the Short-Axis Plane by a Mechanical Scanning Ultrasonic Probe," in Journal of Medical Ultrasonics Vol. 34, No. 1, pp. 23-27 (March, 2007)

 
45. Toshio Yamagishi, Makoto Kato, Yoshiro Koiwa, Hideyuki Hasegawa, Hiroshi Kanai, "Usefulness of Measurement of Carotid Arterial Wall Elasticity Distribution in Detection of Early-Stage Atherosclerotic Lesions Caused by Cigarette Smoking," in J. Med. Ultrasonics Vol. 33, No. 4, pp. 203-210 (December 2006)

 
46. Hideyuki Hasegawa and Hiroshi Kanai, "Modification of the Phased-Tracking Method for Reduction of Artifacts in Estimated Artery Wall Deformation," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. Vol. 53, No. 11, pp. 2050-2064 (November 2006)

 
47. Shutaro Kunii, Junichi Sugawara, Yoshitaka Kimura, Noriaki Imai, Hiroshi Chisaka, Hideyuki Hasegawa, Yoshiro Koiwa, Hiroshi Kanai, Kunihiro Okamura, "Fetal Myocardial Thickening Measured by Ultrasonic-Based Technique Called "Phased-Tracking Method"," in Fetal Diagnosis and Therapy Vol. 21, No. 5, pp. 458-465, 2006.

 
48. Hideyuki Hasegawa and Hiroshi Kanai, "Measurement of Nonlinear Property of Arterial Wall Using Remote Cyclic Actuation," in J. Med. Ultrasonics Vol. 33, No. 3, pp. 143-151 (2006).

 
49. Jun Inagaki, Hideyuki Hasegawa, Hiroshi Kanai, Masataka Ichiki and Fumiaki Tezuka, "Tissue Classification of Arterial Wall Based on Elasticity Image," in Japanese Journal of Applied Physics Vol. 45, No. 5B, pp. 4732-4735, May 2006.

 
50. Chihiro Arihara, Hideyuki Hasegawa, and Hiroshi Kanai, "Accurate Ultrasonic Measurement of Surface Profile Using Phase Shift of Echo and Inverse Filtering," in Japanese Journal of Applied Physics Vol. 45, No. 5B, pp. 4727-4731, May 2006.

 
51. Hideyuki Hasegawa, Mikito Takahashi, Yoshifumi Nishio, and Hiroshi Kanai, "Generation of Strain Inside Objects Using Dual Acoustic Radiation Force," in Japanese Journal of Applied Physics Vol. 45, No. 5B, pp. 4706-4711, May 2006.

 
52. Takashi Mashiyama, Hideyuki Hasegawa, and Hiroshi Kanai, "Designing Beam Steering for Accurate Measurement of Intima-Media Thickness at Carotid Sinus," in Japanese Journal of Applied Physics Vol. 45, No. 5B, pp. 4722-4726, May 2006.

 
53. Hiroshi Kanai, Hideyuki Hasegawa, and Kohsuke Imamura, "Spatial Distribution Measurement of Heart Wall Vibrations Generated by Remote Perturbation of Inner Pressure," in Japanese Journal of Applied Physics Vol. 45, No. 5B, pp. 4718-4721, May 2006.

 
54. Hideyuki Hasegawa and Hiroshi Kanai, "Improving Accuracy in Estimation of Artery-Wall Displacement by Referring to Center Frequency of RF Echo," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Vol. 53, No. 1, pp. 52-63, January 2006.

 
55. Hiroshi Kanai, "Propagation of Spontaneously Actuated Pulsive Vibration in Human Heart Wall and In Vivo Viscoelasticity Estimation," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Vol. 51, No. 11, pp. 1931-1942, November 2005.

 
56. Masataka Sugimoto, Hideyuki Hasegawa, and Hiroshi Kanai, "Change in Elasticity Caused by Flow-Mediated Dilation Measured Only for Intima-Media Region of Brachial Artery," in Japanese Journal of Applied Physics Vol. 44, No. 8, pp. 6297-6301, August 2005.

 
57. Kazuhiro Sunagawa and Hiroshi Kanai, "Measurement of Shear Wave Propagation and Investigation of Estimation of Shear Viscoelasticity for Tissue Characterization of the Arterial Wall," in J. Med. Ultrasonics Vol. 32, pp. 39-47, July 2005.

 
58. Hideyuki Hasegawa and Hiroshi Kanai, "Frequency Analysis of Strain of Cylindrical Shell for Assessment of Viscosity," in Japanese Journal of Applied Physics Vol. 44, No. 6B, pp. 4609-4614, June 2005.

 
59. Jun Inagaki, Hideyuki Hasegawa, Hiroshi Kanai, Masataka Ichiki and Fumiaki Tezuka, "Construction of Reference Data for Tissue Characterization of Arterial Wall Based on Elasticity Images," in Japanese Journal of Applied Physics Vol. 44, No. 6B, pp. 4593-4597, June 2005.

 
60. Jiang Tang, Hideyuki Hasegawa and Hiroshi Kanai, "Cross-Sectional Elasticity Imaging of Arterial Wall by Comparing Measured Change in Thickness with Model Waveform," in Japanese Journal of Applied Physics Vol. 44, No. 6B, pp. 4588-4592, June 2005.

 
61. Nozomi Nakagawa, Hideyuki Hasegawa, and Hiroshi Kanai, "Cross-Sectional Elasticity Imaging of Carotid Arterial Wall in Short-Axis Plane by Transcutaneous Ultrasound" in Japanese Journal of Applied Physics Vol. 43, No. 5B, pp. 3220-3226, May 2004.

 
62. Hideyuki Hasegawa, and Hiroshi Kanai, "Measurement of Elastic Moduli of the Arterial Wall at Multiple Frequencies by Remote Actuation for Assessment of Viscoelasticity" in Japanese Journal of Applied Physics Vol. 43, No. 5B, pp. 3197-3203, May 2004.

 
63. Hideyuki Hasegawa, Hiroshi Kanai, and Yoshiro Koiwa, "Detection of Lumen-Intima Interface of Posterior Wall for Measurement of Elasticity of the Human Carotid Artery" in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Vol. 51, No. 1, pp.93-108, 2004.

 
64. Kazuaki Michishita, Hideyuki Hasegawa, and Hiroshi Kanai, "Ultrasonic Measurement of Minute Displacement of Object Cyclically Actuated by Acoustic Radiation Force" in Japanese Journal of Applied Physics Vol. 42, Part 1, No. 7A, pp. 4608-4612, July 2003.

 
65. Hiroshi Kanai, Hideyuki Hasegawa, Masataka Ichiki, Fumiaki Tezuka, Yoshiro Koiwa, "Elasticity Imaging of Atheroma with Transcutaneous Ultrasound -Preliminary Study-" in Circulation Vol. 107, No. 24, pp. 3018-3021, June 24, 2003.

 
66. Hideyuki Hasegawa, Hiroshi Kanai, Yoshiro Koiwa, and James P. Butler, "Measurement and Change in Wall Thickness of Cylindrical Shell Due to Cyclic Remote Actuation for Assessment of Viscoelasticity of Arterial Wall" in Japanese Journal of Applied Physics Vol. 42, Part 1, No. 5B, pp. 3255-3261, May 2003.

 
67. Hiroshi Kanai, Yoshiro Koiwa, Shin'ichi Katsumata, Naoyuki Izumi, Motonao Tanaka, "Measurement of Rapid Variation in Ultrasound Backscattering during Change in Thickness of Tissue Phantom" in Japanese Journal of Applied Physics Vol. 42, Part 1, No. 5B, pp. 3239-3245, May 2003.

 
68. Hiroshi Kanai, Shin-ichi Katsumata, Hideyuki Honda, and Yoshiro Koiwa, "Measurement and Analysis of Vibration in the Myocardium Telescopic Motion for Novel Echo-Graphic Diagnosis" in Acoustical Science and Technology, Vol. 24, No. 1, pp. 17-22, 2003.

 
69. Yoshiro Koiwa, Hiroshi Kanai, Hideyuki Hasegawa, Yoshiko Saitoh, Kunio Shirato, "Left Ventricular Transmural Systolic Function by High-sensitivity Velocity Measurement "Phased Tracking Method" Across the Septum in Doxorubicin Cardiomyopathy" in Ultrasound in Medicine and Biology, vol. 28, Nos. 11/12, pp. 1395-1403, 2002.

 
70. Masaru Watanabe, Hideyuki Hasegawa, Hiroshi Kanai, "Investigation on Accuracy in Measurement of Small Change in Arterial Wall Thickness by Computer Simulation of Ultrasonic Field in 3-D Space" in The Journal of the Acoustical Society of Japan, Vol. 58, No. 11, pp. 696-703, 2002.(in Japanese)

 
71. Yoshiro Koiwa, Hideichi Kamada, Mikio Inose, Kunio Shirato, Yoshiko Saito, Hideyuki Hasegawa, Hiroshi Kanai, "Systolic Heterogeneity of Transmural Myocardial Function in Normal Subjects: Physiological Function Heterogeneity" in Tohoku J. Exp. Med, Vol. 197, pp. 183-187, 2002.

 
72. Masaru Watanabe, Hideyuki Hasegawa, Hiroshi Kanai, "Optimization of Condition on Ultrasonic Beam for Measurement of Small Change in Thickness of Arterial Wall" in Japanese Journal of Applied Physics, Vol. 41, Part 1, No. 5B, pp. 3613-3618, 2002.

 
73. Hideyuki Hasegawa, Hiroshi Kanai, Yoshiro Koiwa, "Modified Phased Tracking Method for Measurement of Change in Thickness of Arterial Wall" in Japanese Journal of Applied Physics, Vol. 41, Part 1, No. 5B, pp. 3563-3571, 2002.

 
74. Hitoshi Mita, Hiroshi Kanai, Yoshiro Koiwa, Masataka Ichiki, and Fumiaki Tezuka, "Cross-sectional Elastic Imaging of Arterial Wall using Intravascular Ultrasonography (IVUS)," in Japanese Journal of Applied Physics, Vol. 40, Part 1, No. 7, pp. -, 2001.

 
75. Masaru Watanabe and Hiroshi Kanai, "Optimization of Focal Position of Ultrasonic Beam in Measurement of Small Change in Arterial Wall Thickness," in Japanese Journal of Applied Physics, Vol. 40, Part 1, No. 5B, pp. 3918-3921, 2001.

 
76. Hiroshi Kanai and Yoshiro Koiwa, "Myocardial Rapid Velocity Distribution," in Ultrasound in Medicine and Biology, vol. 27, No. 4, pp. 481-498, 2001.

 
77. Hideyuki Hasegawa, Hiroshi Kanai, Nozomu Hoshimiya, and Yoshiro Koiwa, "Evaluation of Regional Elastic Modulus of Cylindrical Shell with Nonuniform Wall Thickness," in Journal of Medical Ultrasonics, vol. 28, No. 1, pp. J3--J13, 2001.(in Japanese)
    
    Hideyuki Hasegawa, Hiroshi Kanai, Nozomu Hoshimiya, Yoshiro Koiwa, "Evaluating the Regional Elastic Modulus of a Cylindrical Shell with Nonuniform Wall Thickness" in J. Med. Ultrasonics, Vol. 31, pp. 81-90, 2004.(in English)

 
78. Hideyuki Hasegawa, Hiroshi Kanai, Nozomu Hoshimiya, and Yoshiro Koiwa, "Reduction of Influence of Decrease in Signal-to-Noise Ratio in Measurement of Change in Thickness of Arterial Wall Due to Heartbeat," in Japanese Journal of Applied Physics,vol. 39, part 1, no. 5B, pp. 3257-3261, 2000.(in Japanese)

 
79. Hiroshi Kanai and Yoshiro Koiwa, "Real-time Velocimetry for Evaluation of Change in Thickness of Arterial Wall," in Ultrasonics, vol. 38, no. 1-8, pp. 381-386, 2000.

 
80. Hiroshi Kanai, Sachiko Yonechi, Ikuko Susukida, Yoshiro Koiwa, Hide-ichi Kamada, and Motonao Tanaka "Onset of Pulsatile Waves in the Heart Walls at End-systole," in Ultrasonics, vol. 38, no. 1-8, pp. 405-411, 2000.

 
81. Kazuhiro Sunagawa, Hiroshi Kanai, Yoshiro Koiwa, Keiko Nitta, and Motonao Tanaka, "Simultaneous Measurement of Vibrations on Arterial Wall at Upstream and Downstream of Arteriostenosis Lesion and their Analysis," in Journal of Medical Ultrasonics, vol. 27, no. 1, pp. 15-31, 2000. (in Japanese)
    
    Kazuhiro Sunagawa, Hiroshi Kanai, Yoshiro Koiwa, Keiko Nitta, and Motonao Tanaka, "Simultaneous Measurement of Vibrations on Arterial Wall at Upstream and Downstream of Arteriostenosis Lesion and their Analysis," in Journal of Medical Ultrasonics, Vol. 27, No. Winter, pp. 157-173, 2001. (in English)

 
82. Hitoshi Asai and Hiroshi Kanai, "Noninvasive Measurement of Stiffness and Density of Bone for Its Diagnosis Using Ultrasound," in Journal of Medical Ultrasonics, vol. 26, no. 10, pp. 1027-1033, 1999. (in Japanese)
    
    Hitoshi Asai and Hiroshi Kanai, "Noninvasive Measurement of Stiffness and Density of Bone for Its Diagnosis Using Ultrasound," in Journal of Medical Ultrasonics, Vol. 29, No. Autumn, pp. 129-136, 2002. (in English)

 
83. Hiroshi Kanai, Yoshiro Koiwa, and Jianping Zhang, "Real-Time Measurements of Local Myocardium Motion and Arterial Wall Thickening," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 46, no. 5, pp. 1229-1241, September 1999.

 
84. Hiroshi Kanai, Kohshiro Sugimura, Yoshiro Koiwa, and Yasuo Tsukahara, "Accuracy Evaluation in Ultrasonic-based Measurement of Microscopic Change in Thickness," in Electronics Letters, vol. 35, no. 12, pp. 949-950, 10th June 1999.

 
85. Hiroshi Kanai, Yoshiro Koiwa, Yoshiko Saito, Ikuko Susukida, and Motonao Tanaka, "In vivo Measurement of Small Velocity Signals and Change in Thickness of the Heart Walls," in Japanese Journal of Applied Physics, vol.38, part 1, no. 5B, pp. 3403-3408, May 1999.

 
86. Hiroshi Kanai, Shigemitsu Nakaya, Hideyuki Honda, and Yoshiro Koiwa, "Noninvasive Estimation of Left-Ventricular End-Diastole Elasticity by Analyzing Heart Wall Vibrations," in Electronics Letters, vol. 35, no. 10, pp. 765-766, 13th May 1999.

 
87. Hiroshi Kanai and Yoshiro Koiwa, "PARCORR-Based Time-Dependent AR Spectrum Estimation of Heart Wall Vibrations," in IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E82-A, no. 4, pp. 572-579, April 1999.
    The pdf file of this article is provided under the permission of IEICE with permission number of 06RB0109.

 
88. Nakaya shigemitsu, Hiroshi Kanai, Noriyoshi Chubachi, Hideyuki Honda, and Yoshiro Koiwa, "Noninvasive Measurement of Left Ventricular End-Diastolic Pressure and Myocardial Elasticity by Analysis of Small Vibration on Heart Wall," in Japanese Journal of Medical Electronics and Biological Engineering, vol.37, no. 1, pp. 1-8, April 1999. (in Japanese)

 
89. Hideyuki Honda, Shigemitsu Nakaya, Hideichi Kamada, Hideyuki, Hasegawa, Jun Demachi, Hisao Chikama, Kohshiro Sugimura, Yoshito Yamamoto, Norihisa Kumasaka, Tamotsu Tanita, Jun Ikeda, Hiroshi Kanai, Yoshiro Koiwa, and Kunio Shirato, "Non-invasive Estimation of Human Left Ventricular End-Diastolic Pressure," in Medical Engineering & Physics, vol. 20, pp. 485-488, 1998

 
90. Hideyuki Hasegawa, Hiroshi Kanai, Nozomu Hoshimiya, Noriyoshi Chubachi, and Yoshiro Koiwa, "Frequency Analysis of Change in Thickness of Arterial Wall," in The Journal of the Acoustical Society of Japan, vol. 54, no. 7, pp. 473-481, 1998. (in Japanese)

 
91. Kohshiro Sugimura, Hiroshi Kanai, Noriyoshi Chubachi, Yasuo Tsukahara, Yoshiro Koiwa, Hideichi Kamada, and Fumiaki Tezuka, "Noninvasive Evaluation of Cardiomyopathy by Measuring Thickness Change in local Myocardium," in Journal of Medical Ultrasonics, vol. 25, no. 5, pp. 625-631, May 1998. (in Japanese)

 
92. Hideyuki Hasegawa, Hiroshi Kanai, Nozomu Hoshimiya, Noriyoshi Chubachi, and Yoshiro Koiwa, "Accuracy Evaluation in the Measurement of a Small Change in the Thickness of Arterial Walls and the Measurement of Elasticity of the Human Carotid Artery," in Japanese Journal of Applied Physics, vol. 37, Part 1, no. 5B, pp. 3101-3105, May 1998.

 
93. Masahiko Takano, Hiroshi Kanai, Nozomu Hoshimiya, and Noriyoshi Chubachi, "Dependence of Elastic Modulus on Inner Pressure of Tube Wall Estimated from Measured Pulse Wave Velocity," in IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E81-A, no. 5, pp. 889-894, May 1998.
    The pdf file of this article is provided under the permission of IEICE with permission number of 06RB0109.

 
94. Hiroshi Kanai, Hideyuki Hasegawa, Noriyoshi Chubachi, Yoshiro Koiwa, and Motonao Tanaka, "Noninvasive Evaluation of Local Myocardial Thickening and Its Color-Coded Imaging," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 44, no. 4, pp. 752-768, July 1997.

 
95. Hideyuki Hasegawa, Hiroshi Kanai, Noriyoshi Chubachi, and Yoshiro Koiwa, "Evaluation of the Elastic Modulus of the Arterial Wall by Accurate Noninvasive Measurement of Change in Its Thickness," in Journal of Medical Ultrasonics, vol.24, no. 6, pp. 851-860, June 1997. (in Japanese)

 
96. Masashi Ozawa, Hiroshi Kanai, and Noriyoshi Chubachi, "Analysis of Small Vibrations on the Arterial Wall Measured Using Ultrasound in In vivo," in The Journal of the Acoustical Society of Japan, vol. 53, no. 7, pp. 517-523, July 1997. (in Japanese)

 
97. Hideyuki Hasegawa, Hiroshi Kanai, Noriyoshi Chubachi, and Yoshiro Koiwa, "Evaluation of Local Elastic Characteristics by Accurate Noninvasive Measurement of Small Vibrations on Arterial Wall," in Journal of Acoustical Society of Japan, vol. 53, no. 5, pp. 346-351, May 1997. (in Japanese)

 
98. Hiroshi Kanai, Masaki Imai, and Noriyoshi Chubachi, "Accurate Power Spectrum Estimation of a Damped Sinusoidal Signal in Low SNR Cases Based on a Newly Defined Transfer Function," in Acustica acta acustica vol. 8, no. 32, pp. 297-303, March/April 1997.

 
99. Hideyuki Hasegawa, Hiroshi Kanai, Noriyoshi Chubachi, and Yoshiro Koiwa, "Noninvasive Evaluation of Poisson's Ratio of Arterial Wall Using Ultrasound," in Electronics Letters, vol. 33, no. 4, pp. 340-342, February 13th, 1997.

 
100. Hitoshi Asai, Hiroshi Kanai, and Noriyoshi Chubachi, "A New Method Based on the Microdefocusing Method for Measuring Velocity of Sound Propagating on the Surface of Bone," in Japanese Journal of Medical Ultrasonics, vol. 23, no. 12, pp. 865-869, December 1996. (in Japanese)

 
101. Hitoshi Asai, Hiroshi Kanai, and Noriyoshi Chubachi, "Noninvasive Method for Measuring Velocity of Leaky Surface Skimming Compressional Wave Propagating on Bone Surface," in Electronics Letters, vol. 32, no. 24, pp. 2290-2291, 21st November 1996.

 
102. Hitoshi Asai, Hiroshi Kanai, and Noriyoshi Chubachi, "Measurement of Acoustic Impedance of Bone by Considering Reflection and Attenuation of Soft Tissue Using the Ultrasonic Reflection Method," in Japanese Journal of Medical Ultrasonics, vol. 23, no. 9, pp. 643-650, September 1996. (in Japanese)

 
103. Hiroshi Kanai, Michie Sato, Yoshiro Koiwa, and Noriyoshi Chubachi, "Transcutaneous Measurement and Spectrum Analysis of Heart Wall Vibrations," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 43, no. 5, pp. 791-810, September 1996.

 
104. Michie Sato, Hiroshi Kanai, Noriyoshi Chubachi, Hideyuki Honda, and Yoshiro Koiwa, "Measurement of Left Ventricle End-Diastolic Pressure by Analysis of Small Vibration on Heart Wall," in The Journal of Acoustical Society of Japan, vol. 52, no. 9, pp. 703-710, September 1996. (in Japanese)

 
105. Tomohisa Kimura, Hitoshi Asai, Hiroshi Kanai, and Noriyoshi Chubachi, "High-resolution Determination of Transit Delay Time of Ultrasound in a Thin Layer by Deleting the Characteristics of Ultrasonic Transducer Using Cascade Inverse Matrices," in Japanese Journal of Medical Ultrasonics, vol. 23, no. 6, pp. 3-14, June 1996. (in Japanese)

 
106. Michie Sato, Hiroshi Kanai, Noriyoshi Chubachi, Hideyuki Honda, and Yoshiro Koiwa, "Method for Noninvasive Estimation of Left Ventricular End Diastolic Pressure Based on Analysis of Heart Wall Vibration," in Electronics Letters, vol. 32, no. 11, pp. 949-950, 23rd May 1996.

 
107. Yun-Seok Jang, Tetsuya Akasaka, Michie Sato, Hiroshi Kanai, and Noriyoshi Chubachi, "Measurement and Analysis of Vibrations on Surface of Phantom Induced by Piezoelectric Extracorporeal Shock Wave Lithotripter," in Japanese Journal of Applied Physics, vol. 35, Part 1, no. 5B, pp. 3163-3166, May 1996.

 
108. Makoto Kondo, Masashi Ozawa, Hiroshi Kanai, and Noriyoshi Chubachi, "Simultaneous Measurement of Small Vibrations at Multiple Points on Aortic Wall, and the Analysis of Their Spectra," in Japanese Journal of Medical Ultrasonics, vol.23, no. 4, pp. 271-280, April 1996. (in Japanese)

 
109. Kunio Kamimura, Hiroshi Kanai, and Noriyoshi Chubachi, "Design of Optimum FIR Filter for Highly Accurate Weight-Measurement," in The Journal of Acoustical Society of Japan, vol. 52, no. 4, pp. 268-275, April 1996. (in Japanese)

 
110. Makoto Kondo, Hiroshi Kanai, and Noriyoshi Chubachi, "A New Ultrasonic Pulse Doppler-Based Method for Measuring Higher Velocity Components," in The Transactions of the Institute of Electrical Engineers of Japan, vol.115-C, no. 12, pp. 1425-1431, December 1995. (in Japanese)

 
111. Tomohisa Kimura, Hiroshi Kanai, and Noriyoshi Chubachi, "High-Resolution Determination of Transit Time of Ultrasound in a Thin Layer in Pulse-Echo Method" in IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E78-A, no. 12, pp. 1677-1682, December 1995.
     The pdf file of this article is provided under the permission of IEICE with permission number of 06RB0109.

 
112. Hiroshi Kanai, Muhun Park, and Noriyoshi Chubachi, "In vivo Measurement of Frequency Characteristics of Phase Velocity of Bone with Bending-Vibration," in Electronics Letters, vol. 31, no. 23, pp. 1969-1971 October 1995.

 
113. Kunio Kamimura, Hiroshi Kanai, and Noriyoshi Chubachi, "Design of Optimum FIR Filter for Eliminating Mechanical Noise in Weight Measurement with Load Cell" in The Journal of Acoustical Society of Japan, vol. 51, no. 11, pp. 845-853 (November 1995) (in Japanese)

 
114. Hiroshi Kanai, Tomohisa Kimura, and Noriyoshi Chubachi, "Accurate Determination of Transit Time of Ultrasound in Thin Layers" in Electronics Letters, vol. 31, no. 13, pp. 1109-1110 June 22nd 1995.

 
115. Masahiko Takano, Hiroshi Kanai, Noriyoshi Chubachi, Yoshiro Koiwa, Fumiaki Tezuka, and Mitsuhiro Takahashi, "Measurement and Analysis of Small Vibrations on Local Aortic Wall for Diagnosis of Arteriosclerosis," in The Journal of Acoustical Society of Japan, vol. 51, no. 3, pp. 174-181 March 1995. (in Japanese)

 
116. Hiroaki Sato, Hiroshi Kanai, Noriyoshi Chubachi, and Yoshiro Koiwa, "Analysis of Small Vibrations on the Heart Wall Measured by Ultrasonic Doppler for Noninvasive Diagnosis of Cardiac Muscle Dysfunction' in Japanese Journal of Medical Ultrasonics, vol. 22, no. 2, pp. 139-146 February 1995. (in Japanese)

 
117. Ken'ichi Kawabe, Ryoji Murata, Hiroshi Kanai, Noriyoshi Chubachi, and Yoshiro Koiwa, "In vivo measurement of Local Pulse Wave Velocity on Arterial Wall of Human Being by Detecting Small Vibrations for Diagnosis of Atherosclerosis," in The Journal of Acoustical Society of Japan, vol. 51, no. 2, pp. 111-116 February 1995. (in Japanese)

 
118. Ryoji Murata, Hiroshi Kanai, Noriyoshi Chubachi, Yoshiro Koiwa, and Yasuhito Takeuchi "Measurement of Small Vibrations at Two Adjacent Points on the Aorta by Controlling the Direction of an Ultrasonic Beam for Noninvasive Diagnosis of Arteriosclerosis," in Japanese Journal of Medical Ultrasonics, vol.21, no. 11, pp. 709-711, 1994. (in Japanese)

 
119. Moojoon Kim, Hiroshi Kanai, and Noriyoshi Chubachi "Non-Contact Measurement of Particle Velocity Distribution of Ultrasonic Waves along an Elastic Bar Using Laser Doppler Velocimetry," in The Journal of the Acoustical Society of Japan (E), vol. 15, no. 5, pp. 339-344, 1994.

 
120. Hiroshi Kanai, Toyohiko Hori, Noriyoshi Chubachi, and Takahiko Ono "Delayed Block Transfer Function in the Frequency Domain," in IEEE Transactions on Signal Processing, vol. 42, no. 7, pp. 1669-1684, 1994.

 
121. Hiroshi Kanai, Yun-Seok Jang, Noriyoshi Chubachi, and Yoshikatsu Tanahashi "Power Difference in Spectrum of Sound Radiation before and after Break of Phantom by Piezoelectric Extracorporeal Shock Wave Lithotripter," in Japanese Journal of Applied Physics, vol. 33, part1 no, 5B, pp. 3159-3161, 1994.

 
122. Hiroshi Kanai, Ken'ichi Kawabe, Masahiko Takano, Ryoji Murata, Noriyoshi Chubachi, and Yoshiro Koiwa "New Method for Evaluating Local Pulse Wave Velocity by Measuring Vibrations on Arterial Wall," in Electronics Letters, vol.30, no. 7, pp. 534-536, 1994.

 
123. Kunio Kamimura, Hiroshi Kanai, and Noriyoshi Chubachi "Design of Digital Filters and their Evaluation for High Speed and High Accuracy Weight Measurement in Production Line," in The Journal of the Acoustical Society of Japan, vol.50, no. 4, pp. 279-288, 1994. (in Japanese)

 
124. Muhun Park, Hiroshi Kanai, and Noriyoshi Chubachi "In vivo Measurement of Bending-vibration Propagation-velocity of a Bone Using Ultrasonic Doppler Method," in The Journal of the Acoustical Society of Japan,vol.50, no. 2, pp. 103-109, 1994. (in Japanese)

 
125. Hiroaki Satoh, Hiroshi Kanai, and Noriyoshi Chubachi "Measurement of Small Vibration on Heart Wall by Tracking Cardiac Motion Using Dynamic Programming," in The Journal of the Acoustical Society of Japan, vol. 50, no. 1, pp. 11-21, 1994. (in Japanese)

 
126. Hiroshi Kanai, Hiroaki Satoh, Kouichi Hirose, and Noriyoshi Chubachi "A New Method for Measuring Small Local Vibrations in the Heart Using Ultrasound," in IEEE Transactions on Biomedical Engineering, vol. 40, no. 12, pp. 1233-1242, 1993.

 
127. Hiroshi Kanai and Noriyoshi Chubachi "Theoretical Evaluation of Bias Error and Variance in DFT-based Frequency Estimation under Low SNR," in The Journal of the Acoustical Society of Japan, vol. 49, no. 11, pp. 763-774, 1993. (in Japanese)

 
128. Masaki Imai, Hiroshi Kanai, Noriyoshi Chubachi, Shun Oguro, and Hideo Suzuki "A New Method for Quantitative Measurement of Correlation Defined between Different Frequency Band Components," in The Journal of the Acoustical Society of Japan, vol. 49, no. 6, pp. 389-396, 1993. (in Japanese)

 
129. Ken'ichi Kawabe, Hiroshi Kanai, and Noriyoshi Chubachi "Accuracy Evaluation in Ultrasonic-Doppler-based Measurement of Small Vibrations for Acoustical Diagnosis of the Aortic Wall," in Electronics Letters, vol. 29, no. 10, pp. 915-916, 1993.

 
130. Kouichi Hirose, Hiroshi Kanai, and Noriyoshi Chubachi "Tracking of Aortic Wall by Cross Correlation and Estimation of its Small Vibration Velocity," in The Journal of the Acoustical Society of Japan, vol. 48, no. 12, pp. 863-870, 1992. (in Japanese)

 
131. Hiroshi Kanai, Noriyoshi Chubachi, and Toshio Sannomiya "Microdefocusing Method for Measuring Acoustic Properties Using Acoustic Microscope," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol.39, no. 5, pp. 643-652, 1992.

 
132. Hiroshi Kanai, Noriyoshi Chubachi, and Toshio Sannomiya "Non-Contact Measurement of Acoustic Emission Signals in the 100 MHz Frequency Range Using an Acoustical Microscope," in Acustica, vol. 76, no. 2, pp. 199-204, 1992.

 
133. Hiroshi Kanai, Noriyoshi Chubachi, Ken'iti Kido, Yoshiro Koiwa, Takehiko Takagi, Junichi Kikuchi, and Tamotsu Takishima "A New Approach to Time Dependent AR Modeling of Signals and Its Application to Analysis of the Fourth Heart Sound," in IEEE Transactions on Signal Processing, vol. 40, no. 5, pp. 1198-1205, 1992.

 
134. Hiroshi Kanai, Noriyoshi Chubachi, and Toshishige Takeda "Detection of Acoustic Emission Signals in the Frequency Range up to 100 MHz," in The Transactions of the Institute of Electrical Engineers of Japan. C, vol. 111-C, no. 12, pp. 631-636, 1991. (in Japanese)

 
135. Noriyoshi Chubachi and Hiroshi Kanai "Noncontact AE Measurement System Using Acoustic Microscope," in Electronics Letters, vol. 27, no. 23, pp. 2104-2105, 1991.

 
136. Kang-lyeol Ha, Hiroshi Kanai, Noriyoshi Chubachi, and Kunio Kamimura "A Basic Study on Nondestructive Evaluation of Potatoes Using Ultrasound," in Japanese Journal of Applied Physics, vol. 30, Supplement 30-1, pp. 80-82, 1991.

 
137. Hiroshi Kanai, Yoshihiko Shishido, Noriyoshi Chubachi, Yoshiro Koiwa, Takehiko Takagi, Jun'iti Kikuchi, Hideyuki Honda, Nobuo Hosi, and Tamotsu Takishima "Estimation of Acoustic Transfer Function of the Heart by Analyzing the Heart Sounds Simultaneously Detected on the Chest Wall and in the Esophagus," in Japanese Journal of Medical Electronics and Biological Engineering, vol. 29, no. 2, pp. 115-122, 1991. (in Japanese)

 
138. Hiroshi Kanai and Ken'iti Kido "Estimation of Input Pulse Locations From the Response of an All-Pole Transfer System Using Tapered Rank Reduction," in IEEE Transactions on Signal Processing, vol. 39, no. 1, pp. 148-159, 1991.

 
139. Krishnamachari Jayanthi, Akihiro Suzuki, Hiroshi Kanai, Youko Akiyama, Yoshiyuki Kawazoe, Masayuki Kimura, Ken'iti Kido, and Keisho Tsukamoto "Automatic Devanagari Character Recognition Using Structure Analysis," in Journal of Japan Society of Information and Knowledge, vol. 1, no. 1, pp. 25-39, 1990.

 
140. Hiroshi Kanai, Ken'iti Kido, Atsushi Suzuki, and Atsushi Kanai "Transfer Model Excited by Multi-pulse Series and its Application to Analysis of Transition of Yen/Dollar Exchange Rate," in Journal of the Japan Statistical Society, vol. 20, no. 2, pp. 255-276, 1990. (in Japanese)

 
141. Hiroshi Kanai, Masato Abe, and Ken'iti Kido "A New Method to Arrange an Additional Sound Source Used in Active Noise Control," in Acustica, vol. 70, no. 4, pp. 258-264, 1990.

 
142. Takahiko Ono, Masanao Ohashi, Toshishige Maeda, and Hiroshi Kanai "Estimation of the Damping Factor of a Signal Transmission System by Use of a Delayed Block Coherence Function," in The Journal of the Acoustical Society of Japan, vol. 46, no. 3, pp. 220-228, 1990. (in Japanese)

 
143. Akihiro Suzuki, Hiroshi Kanai, Yoshiyuki Kawazoe, Shozo Makino, and Ken'iti Kido "A Method of Generating Template Patterns from a Few Sample Patterns in Character Recognition," in The Transactions of the Institute of Electronics, Information and Communication Engineers, vol. J72-D-II, no. 11, pp. 1833-1838, 1989. (in Japanese)
     The pdf file of this article is provided under the permission of IEICE with permission number of 06RB0109.

 
144. Ken'iti Kido, Hiroshi Kanai, and Masato Abe "Active Reduction of Noise by Additional Noise Source and Its Limit," in Transactions of the ASME Journal of Vibration, Acoustics, Stress, and Reliability in Design, vol. 111, pp. 480-485, 1989.

 
145. Akihiro Suzuki, Hiroshi Kanai, Yoshiyuki Kawazoe, Shozo Makino, and Ken'iti Kido "Printed Devanagari Text Recognition Method by Simultaneous Extraction and Recognition Procedures," in The Transactions of the Institute of Electronics, Information and Communication Engineers, vol. J72-D-II, no. 10, pp. 1643-1649, 1989. (in Japanese)
     The pdf file of this article is provided under the permission of IEICE with permission number of 06RB0109.

 
146. Akihiro Suzuki, Hiroshi Kanai, Yoshiyuki Kawazoe, Shozo Makino, and Ken'iti Kido "A New Discrimination Method for Similar Fonts of Devanagari Character Set," in The Transactions of the Institute of Electronics, Information and Communication Engineers, vol. J72-D-II, no. 9, pp. 1588-1591, 1989. (in Japanese)
     The pdf file of this article is provided under the permission of IEICE with permission number of 06RB0109.

 
147. Hiroshi Kanai, Yoshifumi Nagata, Masato Abe, Shozo Makino, and Ken'iti Kido "A Method to Locate Multiple Sound Sources in One-Dimensional Space Using Tapered Singular-Value-Decomposition and Pole Estimation," in The Journal of the Acoustical Society of Japan, vol. 45, no. 9, pp. 681-688, 1989. (in Japanese)

 
148. Hiroshi Kanai and Ken'iti Kido "A New Method to Locate Multiple Sound Sources in One-dimensional Space Based on Estimation of Each Source Sound," in The American Society of Mechanical Engineers, Pressure Vessels & Piping, vol.177, pp. 227-232, 1989.

 
149. Xueming Gao, Yutaka Kaneko, Hiroshi Kanai, Masato Abe, Shozo Makino, and Ken'iti Kido "Preliminary Investigation on Shape Estimation of Concrete Pile by Vibration Analysis," in The Journal of the Acoustical Society of Japan (E), vol. 10, no. 1, pp. 5-10, 1989.

 
150. Hiroshi Kanai and Ken'iti Kido "Estimation of Multipulse Series Driving of an All-Pole Transfer System (Application of Tapering Window in Singular Value Decomposition)," in Transactions of the Japan Society of Mechanical Engineers. Series C, vol. 54, no. 508, pp. 2907-2914, 1988. (in Japanese)

 
151. Hiroshi Kanai, Masato Abe, Shozo Makino, and Ken'iti Kido "Simultaneous Estimation of All-pole Transfer System and Multiple Excitation Pulses from Autoregressive Process Driven by Multi-pulse," in The Journal of the Acoustical Society of Japan, vol. 44, no. 7, pp. 503-509, 1988. (in Japanese)

 
152. Akihiro Shima, Chun-Duck Kim, Akihiro Yuasa, Hiroshi Kanai, Masato Abe, and Ken'iti Kido "A Method of Speech Recording in a Noisy Environment Caused by Vibration of Panel," in The Journal of the Acoustical Society of Japan (E), vol. 9, no. 3, pp. 115-121, 1988.

 
153. Akihiro Yuasa, Hiroshi Kanai, Masato Abe, and Ken'iti Kido "Detection of Flaws in Ball Bearings by Analysis of Vibration Signals Detected by Two Pick-ups," in The Journal of the Acoustical Society of Japan (E), vol. 9, no. 2, pp. 81-87, 1988.

 
154. Masato Abe, Akihiro Shima, Takashi Ueda, Hiroshi Kanai, Shozo Makino, and Ken'iti Kido "High Speed Computing Machine micro KIDOCH for Digital Signal Processing on Acoustics." in Journal of Information processing, vol. 28, no. 12, pp. 1306-1317, 1987. (in Japanese)

 
155. Hiroshi Kanai, Masato Abe, and Ken'iti Kido, "Accurate Autoregressive Spectrum Estimation at Low Signal-to-Noise Ratio Using a Phase Matching Technique," in IEEE Transactions Acoustics, Speech, and Signal Processing, vol. ASSP-35, no. 9, pp. 1264-1272, 1987.

 
156. Hiroshi Kanai, Masato Abe, and Ken'iti Kido "Estimation of the Surface Roughness on the Race or Balls of Ball Bearings by Vibration Analysis," in Transactions of the American Society Mechanical Engineers Journal of Vibration, Acoustics, Stress, and Reliability in Design, vol. 109, pp. 60-68, 1987.

 
157. Hiroshi Kanai, Masato Abe, and Ken'iti Kido "Accurate Estimation of the Surface Roughness on the Rolling Ring in a Ball Bearing by Vibration Analysis," in The Journal of the Acoustical Society of Japan (E), vol. 7, no. 6, pp. 343-352, 1986.

 
158. Hiroshi Kanai, Masato Abe, and Ken'iti Kido "Detection of Slight Defects in Ball Bearings by Non-Periodic Analysis," in The Journal of the Acoustical Society of Japan (E), vol. 7, no. 4, pp. 219-228, 1986.
159. Hiroshi Kanai, Masato Abe, and Ken'iti Kido "Detection and Discrimination of Flaws in Ball Bearings by Vibration Analysis," in The Journal of the Acoustical Society of Japan (E), vol. 7, no. 2, pp. 121-131, 1986.

 

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