Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Yoshiro Koiwa"'
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 51:93-108
In our series of studies on noninvasive assessment of the regional elasticity of the arterial wall, the displacement gradient (change in thickness) of the arterial wall caused by the heartbeat was measured by the phased tracking method. Because the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bff8eeed68e11bd24edeaf1c8848cea
https://doi.org/10.1109/tuffc.2004.1268471
https://doi.org/10.1109/tuffc.2004.1268471
Publikováno v:
Japanese Journal of Applied Physics. 42:3239-3245
The cyclic variation in ultrasound integrated backscatter (IB) during one cardiac cycle offers potential for evaluation of myocardial contractility. Since there is large motion due to the heartbeat in the heart wall, in the conventional method, the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2417df92090b95c656e0c5d1b7557bff
https://doi.org/10.1143/jjap.42.3239
https://doi.org/10.1143/jjap.42.3239
Publikováno v:
Japanese Journal of Applied Physics. 42:3255-3261
To characterize tissues in atherosclerotic plaques, we have developed a method, the phased tracking method, for measuring the strain (change in wall thickness) and elasticity of the arterial wall. However, some types of tissue, such as lipids and blo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4827e91a9c2477169d6a652545e3a2d9
https://doi.org/10.1143/jjap.42.3255
https://doi.org/10.1143/jjap.42.3255
Publikováno v:
Acoustical Science and Technology. 24:17-22
We have already developed a novel ultrasonic-based method, namely, the phased tracking method, to measure the rapid velocity in the heart wall by accurately tracking the movement in the heart wall. By applying this method to in vivo experiments, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f8c5a082ffd3682999eb173e193f08e
https://doi.org/10.1250/ast.24.17
https://doi.org/10.1250/ast.24.17
Publikováno v:
Ultrasound in Medicine & Biology. 28:1395-1403
The clinical usefulness of doxorubicin is limited by doxorubicin-induced cardiomyopathy (DoxCM). The prognosis of this disorder is poor, and a sensitive noninvasive method for detection of DoxCM is strongly required. In this study, we examined if the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c9f668693f5b530d65e3536e3adc6b8
https://doi.org/10.1016/s0301-5629(02)00644-0
https://doi.org/10.1016/s0301-5629(02)00644-0
Publikováno v:
Japanese Journal of Applied Physics. 41:3563-3571
In this study, the change in thickness of the arterial wall caused by the heartbeat was measured by the phased tracking method [IEEE Trans. UFFC. 43 (1996) 791] for noninvasive assessment of the regional elasticity of the arterial wall. In the phased
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c462a98bd729621290d625c4d3c0e075
https://doi.org/10.1143/jjap.41.3563
https://doi.org/10.1143/jjap.41.3563
Autor:
Masaru Watanabe, Hiroshi Kanai, Fumiaki Tezuka, Hideyuki Hasegawa, Kazuhiro Sunagawa, Masataka Ichiki, Yoshiro Koiwa, Etsuko Fushimi
Publikováno v:
Neurosonology. 14:42-46
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b26c4937809b65ca18906ba0e695b722
https://doi.org/10.2301/neurosonology.14.42
https://doi.org/10.2301/neurosonology.14.42
Publikováno v:
The Tohoku Journal of Experimental Medicine. 193:259-277
We examined whether the three states model can explain the systolic and relaxation properties of cardiac muscle to clarify what factors affect these properties. Changing the values of the parameters describing the calcium transient and calcium sensit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3acadc0e7250629d3c6ad257af876ecd
https://doi.org/10.1620/tjem.193.259
https://doi.org/10.1620/tjem.193.259
Autor:
Hiroshi Kanai, Yoshiro Koiwa
Publikováno v:
Ultrasonics. 38:381-386
We previously developed a new method, namely, the phased tracking method, for accurately tracking the movement of the heart wall and arterial wall based on both the phase and magnitude of the demodulated signals to determine the instantaneous positio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c5c8dc1424a08b3fdb59270f93c7624
https://doi.org/10.1016/s0041-624x(99)00118-3
https://doi.org/10.1016/s0041-624x(99)00118-3
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 46:1229-1241
We have already developed a new method, namely, the phased tracking method, to track the movement of the heart wall and arterial wall accurately based on both the phase and magnitude of the demodulated signals to determine the instantaneous position
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc8610874ed894bc2bb566675b69e853
https://doi.org/10.1109/58.796128
https://doi.org/10.1109/58.796128