Výsledky vyhledávání - "Ryoichi Kanda"

Visualization of Clear Echocardiographic Images with Near Field Noise Reduction Technique: Experimental Study and Clinical Experience

Autor: Yumiko Ogata, Junichi Yoshikawa, Takeshi Hozumi, Ryoichi Kanda, Kiyoshi Yoshida, Yasuhiko Abe, Tsutomu Takagi, Toshikazu Yagi, Takashi Akasaka

Publikováno v: Journal of the American Society of Echocardiography. 11:660-667

Background: With transthoracic echocardiography, it is sometimes difficult to obtain a clear image of the apical portion of the heart because of noise near the transducer. To reduce this artifact, we have developed a new technique (near field noise r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77dff66fec5d7cdcbef8cfa1c5e8e655
https://doi.org/10.1016/s0894-7317(98)70043-4

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Usefulness of automated quantitation of regional left ventricular wall motion by a novel method of two-dimensional echocardiographic tracking

Autor: Minoru Yoshiyama, Junichi Yoshikawa, Ryoichi Kanda, Yasuhiko Takemoto, Kenichi Sugioka, Yasuhiko Abe, Masahide Nishiura, Takeshi Hozumi, Yoshiki Matsumura, Keitaro Ogawa

Publikováno v: The American journal of cardiology. 98(11)

A novel 2-dimensional (2-D) echocardiographic tracking method enables the automated tracking of displacement between 2 points of interest in echocardiographic images. The purpose of this study was to evaluate whether this 2-D tracking method could be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c866ef33d153c5af07eeef3c60f18d5c
https://pubmed.ncbi.nlm.nih.gov/17697844

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Novel approach to the quantitation of regional left ventricular systolic and diastolic function using tissue Doppler imaging to create a myocardial velocity profile and gradient

Autor: Hirotsugu Yamada, Takeo Ishimoto, Yoshifumi Oishi, Ryoichi Kanda, Tomotsugu Tabata, Sayuri Fujimoto, Hideji Tanaka, Susumu Ito, Yasuhiko Abe, Takashi Oki

Publikováno v: Circulation journal : official journal of the Japanese Circulation Society. 67(5)

The myocardial velocity profile (MVP) and gradient (MVG) between the endocardium and epicardium of the left ventricular (LV) wall measured by color-coded tissue Doppler imaging (TDI) are new indices for evaluating regional LV myocardial function. How

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8748a22820251fcf4b6a2d3048640119
https://pubmed.ncbi.nlm.nih.gov/12736480

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An investigation of wavefront distortion correction: correction using averaged phase information and the effect of correction in one and two dimensions (medical US imaging)

Autor: K. Takamizawa, H. Sasaki, Yoichi Sumino, Ryoichi Kanda

Publikováno v: IEEE 1991 Ultrasonics Symposium.

A method for estimating arrival time fluctuation for wavefront distortion correction is proposed and compared with the cross-correlation method. The improvement of image quality achieved by these methods is almost the same under normal conditions. Ho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fdbfa995a4df8463c3312b602a37a6c6
https://doi.org/10.1109/ultsym.1991.234305

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Ultrasound diagnostic apparatus, and image processing method

Autor: Ryoichi Kanda, Yasuhiko Abe

Publikováno v: The Journal of the Acoustical Society of America. 115:1407

Two-dimensional distribution data of velocities on a moving object in an object to be examined is obtained. A motion field which defines the motion direction of a tissue is stored. A plurality of tracking points are obtained in a tissue range in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43aca989881c88f643d7a283ba46d331
https://doi.org/10.1121/1.1738304

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Ultrasonic diagnosis apparatus

Autor: Ryoichi Kanda, Tetsuya Kawagishi, Yoshitaka Mine

Publikováno v: The Journal of the Acoustical Society of America. 112:14

An ultrasonic diagnosis apparatus includes an ultrasonic probe. A transmitter supplies a transmission pulse to the ultrasonic probe to repeatedly transmit an ultrasonic wave to each of a plurality of scanning lines. A receiver receives echoes of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::31d72318a399bee808893c48a79f9ff5
https://doi.org/10.1121/1.1500883

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Ultrasonic diagnostic apparatus capable of acquiring high quality image by correcting phase distortion contained in ultrsonic pulses

Autor: Ryoichi Kanda, Yoichi Sumino

Publikováno v: The Journal of the Acoustical Society of America. 100:2905

In an ultrasonic diagnostic apparatus (1000), ultrasonic propagation time differences contained in echo signals reflected from a biological body under medical examination are corrected by comprising: a quadrature phase detecting unit (30:130:25) for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fae19ec2d691b24e4a44a34fef9a620d
https://doi.org/10.1121/1.417200

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