K
Kei Yamada
Researcher at Kyoto Prefectural University of Medicine
Publications - 303
Citations - 7815
Kei Yamada is an academic researcher from Kyoto Prefectural University of Medicine. The author has contributed to research in topics: Medicine & Diffusion MRI. The author has an hindex of 43, co-authored 250 publications receiving 6891 citations. Previous affiliations of Kei Yamada include University of Rochester Medical Center & University of Rochester.
Papers
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Journal ArticleDOI
Differences in CT perfusion maps generated by different commercial software: quantitative analysis by using identical source data of acute stroke patients.
Kohsuke Kudo,Makoto Sasaki,Kei Yamada,Suketaka Momoshima,Hidetsuna Utsunomiya,Hiroki Shirato,Kuniaki Ogasawara +6 more
TL;DR: CT perfusion imaging maps were significantly different among commercial software even when using identical source data, presumably because of differences in tracer-delay sensitivity.
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MR Tractography : A Review of Its Clinical Applications
TL;DR: The past, present, and future of tractography is reviewed, focusing primarily on its clinical applications, including stroke, dementia, and dementia.
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Variability in absolute apparent diffusion coefficient values across different platforms may be substantial: a multivendor, multi-institutional comparison study.
Makoto Sasaki,Kei Yamada,Yoshiyuki Watanabe,Mieko Matsui,Masahiro Ida,Shunrou Fujiwara,Eri Shibata +6 more
TL;DR: There is significant variability in ADC values depending on the coil systems, imagers, vendors, and field strengths used for MR imaging, and the relative ADC values may be more suitable than absolute ADC values for evaluating diffusion abnormalities in patients enrolled in multicenter acute ischemic stroke trials.
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Normal diffusion-weighted MRI during stroke-like deficits
Hakan Ay,Ferdinando S. Buonanno,Guy Rordorf,Pamela W. Schaefer,Lee H. Schwamm,Ona Wu,R. G. Gonzalez,Kei Yamada,Gregory A Sorensen,Walter J. Koroshetz +9 more
TL;DR: Normal DWI in patients with stroke-like deficits should stimulate a search for nonischemic cause of symptoms, and more than one-half of such patients have an ischemic cause as the best clinical diagnosis.
Journal ArticleDOI
Comparison of Diameter and Perimeter Methods for Tumor Volume Calculation
A. Gregory Sorensen,Shveta Patel,Carla Harmath,Sarah Bridges,Jennifer Synnott,Amy Sievers,Young-Ho Yoon,E. John Lee,Michael C. Yang,Robert F. Lewis,Gordon J. Harris,Michael H. Lev,Pamela W. Schaefer,Bradley R. Buchbinder,Glenn D. Barest,Kei Yamada,John Ponzo,H. Young Kwon,Joseph J. Gemmete,J Farkas,Andrew L. Tievsky,Richard B. Ziegler,Megan R.C. Salhus,Robert M. Weisskoff +23 more
TL;DR: Variability of measurements was reduced with the computer-assisted perimeter method compared with the diameter method, which suggests that changes in volume can be detected more accurately with the perimeter method.