Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Takahiko Otani"'
Publikováno v:
Journal of Medical Ultrasonics. 42:315-322
To verify the measurement of cortical bone thickness at the distal radius in vivo using an ultrasonic method. The method for estimating cortical bone thickness was derived from experiments with in vitro bovine specimens. Propagation time of echo wave
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a41e149044f17a091c46e52a743b959b
https://doi.org/10.1007/s10396-015-0617-5
https://doi.org/10.1007/s10396-015-0617-5
Autor:
Hiroyuki Hachiya, Mami Matsukawa, Takahiko Otani, Kaoru Yamazaki, Takami Miki, Saeko Fujiwara, Masao Fukunaga, Nobuyuki Endoh, Kosei Yho, Nagai Yoshinori, Hideaki Kishimoto, Hiroshi Kanai
Publikováno v:
Journal of medical ultrasonics (2001). 45(1)
Dual X-ray absorptiometry (DXA) is used to diagnose osteoporosis. On the other hand, quantitative ultrasound (QUS) is widely used to assess bone density as part of medical screening as it is relatively inexpensive and easy to perform. Current QUS dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::760dacee60ba1854cd377c5a29afbcff
https://pubmed.ncbi.nlm.nih.gov/28933006
https://pubmed.ncbi.nlm.nih.gov/28933006
Autor:
I. Nagai, Takako Tobimatsu, K. Takahashi, H. Sai, I. Mano, Takahiko Otani, H. Iio, T. Fujita, K. Horii, G. Iguchi, Hisamitsu Baba, Kousei Yoh
Publikováno v:
Osteoporosis International. 21(10):1781-1790
A reference database for trabecular bone density, cortical thickness, and elastic modulus of trabecular bone for a novel ultrasonic bone densitometry system (LD-100) based on two longitudinal waves (fast and slow) was determined over a wide age range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a89b9e71a28a7bcbc13dd715ffa725d2
https://hdl.handle.net/20.500.14094/90001495
https://hdl.handle.net/20.500.14094/90001495
Autor:
Ryota Teshima, Takahiko Otani, Takashi Yamamoto, T. Okano, I. Mano, Hiroshi Hagino, Hiroshi Katagiri
Publikováno v:
Osteoporosis International. 20:1215-1224
Two longitudinal transmitted waves, fast and slow waves, were observed by employing a new quantitative ultrasound (QUS) method. The trabecular bone measurements generated by this method reflect three-dimensional structural information, and the new QU
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4485bacc7ff932d0d44b4709e81d4a29
https://doi.org/10.1007/s00198-008-0774-0
https://doi.org/10.1007/s00198-008-0774-0
Autor:
Masahiko Takada, Mami Matsukawa, Takahiko Otani, Katsunori Mizuno, Toshiyuki Tsujimoto, Isao Mano
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 55:1480-1487
Ultrasonic waves in cancellous bone change dramatically depending on its structural complexity. One good example is the separation of an ultrasonic longitudinal wave into fast and slow waves during propagation. In this study, we examined fast wave pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::949db9c898ff6a3a9548f1486633e073
https://doi.org/10.1109/tuffc.2008.823
https://doi.org/10.1109/tuffc.2008.823
Autor:
Ryota Teshima, Hiroshi Hagino, Toshiyuki Tsujimoto, Takahiko Otani, Masahiko Takada, Tadahito Yamamoto, Isao Mano
Publikováno v:
Japanese Journal of Applied Physics. 46:4858-4861
An ultrasonic wave transmitted through an in vitro human cancellous bone was experimentally investigated. An osteoporotic cancellous bone specimen was obtained from an in vitro femoral head. A narrow ultrasonic beam was scanned on the specimen surfac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85b4d424ac8190556b4251419dc16394
https://doi.org/10.1143/jjap.46.4858
https://doi.org/10.1143/jjap.46.4858
Autor:
Takahiko Otani
Publikováno v:
Key Engineering Materials. :857-861
Osteoporosis is a disease characterized by decreasing bone density, and is assessed by the bone mass density of cancellous bone. An X-ray method is widely used for noninvasive measurement of bone mass density [mg/cm3]. An ultrasonic method has the po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c97926149a345bf008b64d9c4f886a9b
https://doi.org/10.4028/www.scientific.net/kem.321-323.857
https://doi.org/10.4028/www.scientific.net/kem.321-323.857
Autor:
Yoshiki Nagatani, Hirotaka Imaizumi, Takahiko Otani, Takashi Fukuda, Yoshiaki Watanabe, Mami Matsukawa
Publikováno v:
Japanese Journal of Applied Physics. 45:7186-7190
In cancellous bone, longitudinal waves often separate into fast and slow waves depending on the alignment of bone trabeculae. This interesting phenomenon becomes an effective tool for the diagnosis of osteoporosis because wave propagation behavior de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d40409874fc092a6306256cb58e7ce78
https://doi.org/10.1143/jjap.45.7186
https://doi.org/10.1143/jjap.45.7186
Publikováno v:
Choonpa Igaku. 33:211-220
超音波による骨の評価は踵を測定部位とすることが多く, その指標の一つとして音速 (SOS) が用いられる. 物質の音速は一般に温度の影響を受けるが, 人体の場合は温度は安定していると認
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8045d31ff9aba489633ed2462b671c5
https://doi.org/10.3179/jjmu.33.211
https://doi.org/10.3179/jjmu.33.211
Publikováno v:
Journal of Crystal Growth. 276:424-430
Making use of the RF magnetron sputtering technique, we have succeeded in fabricating ZnO films where c -axis of crystallites are unidirectionally aligned in the plane, without the mechanism of epitaxy. The alignment of c -axis in the plane was then
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6adb80ea9fb331a224077ed5428294a1
https://doi.org/10.1016/j.jcrysgro.2004.12.013
https://doi.org/10.1016/j.jcrysgro.2004.12.013