Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Yuji Iyama"'
Publikováno v:
Case Reports in Orthopedics, Vol 2018 (2018)
We describe a case of lumbar stenosis in which retrospective spectral analysis using dual-layer spectral detector computed tomography (CT) had the ability to expand the evaluable region in the spinal canal. Spinal canal stenosis is a common condition
Externí odkaz:
https://doaj.org/article/ee9cb26e3ab14fe989df154c40374a92
Autor:
Kosuke Morita, Masami Yoneyama, Daisuke Utsunomiya, Yuji Iyama, Tomohiro Namimoto, Yasuyuki Yamashita, Natsuki Maruyama, Takeshi Nakaura, Seitaro Oda, Mika Kitajima
Publikováno v:
Magnetic Resonance in Medical Sciences. 19:48-55
PURPOSE The hybrid compressed sensing (hybrid-CS) technique can shorten the acquisition time compared with the sensitivity encoding (SENSE) technique in lumbar MRI. To evaluate the feasibility of a hybrid-CS technique in comparison with 3D isotropic
Autor:
Tomohiro Namimoto, Masataka Nakagawa, Takeshi Nakaura, Hideaki Yuki, Masafumi Kidoh, Kenichiro Hirata, Yasunori Nagayama, Yasuyuki Yamashita, Daisuke Utsunomiya, Yuji Iyama, Seitaro Oda
Publikováno v:
Academic Radiology. 26:1390-1399
Uterine leiomyomas with high signal intensity on T2-weighted imaging (T2WI) can be difficult to distinguish from sarcomas. This study assessed the feasibility of using machine learning to differentiate uterine sarcomas from leiomyomas with high signa
Autor:
Yuji Iyama, Morikatsu Yoshida, Yasunori Nagayama, Takeshi Nakaura, Shota Tanoue, Ayumi Iyama, Yasuyuki Yamashita
Publikováno v:
Circulation journal : official journal of the Japanese Circulation Society. 84(4)
BACKGROUND The aim of this study was to evaluate the quality and diagnostic performance of virtual monochromatic images (VMI) obtained with dual-layer dual-energy computed tomography (DL-DECT) during indirect CT venography (CTV) for deep vein thrombo
Autor:
Masafumi Kidoh, Kenichiro Hirata, Daisuke Sakabe, Yoshinori Funama, Yuji Iyama, Seitaro Oda, Yasuyuki Yamashita, Yasunori Nagayama, Takeshi Nakaura, Hideaki Yuki, Tomohiro Namimoto, Daisuke Utsunomiya
Publikováno v:
The International Journal of Cardiovascular Imaging. 34:1977-1985
Repeatability of quantitative assessment of atherosclerotic plaques is important for the accurate detection of high-risk plaques in coronary CT angiography (CTA). We assessed the effect of heart rate (HR) on plaque CT number using a coronary artery m
Autor:
Masafumi Kidoh, Kenichiro Hirata, Narumi Taguchi, Yoshinori Funama, Hideaki Yuki, Sadahiro Yamamura, Yuji Iyama, Yasuyuki Yamashita, Yasunori Nagayama, Daisuke Utsunomiya, Masanori Imuta, Hideo Baba, Takeshi Nakaura, Seitaro Oda
Publikováno v:
Academic Radiology. 25:415-422
Rationale and Objectives To assess the effect of model-based iterative reconstruction (MBIR) on image quality and diagnostic performance of low-radiation-dose computed tomography colonography (CTC) in the preoperative assessment of colorectal cancer.
Autor:
Yasuyuki Yamashita, Tomohiro Namimoto, Daisuke Utsunomiya, Hideaki Yuki, Masafumi Kidoh, Kenichiro Hirata, Seitaro Oda, Mika Kitajima, Takeshi Nakaura, Atsushi Takemura, Yasunori Nagayama, Yoshinori Funama, Tomoyuki Okuaki, Yuji Iyama, Kosuke Morita
Publikováno v:
Magnetic Resonance in Medical Sciences
Purpose: We investigated the feasibility of single breath hold unenhanced coronary MRA using multi-shot gradient echo planar imaging (MSG-EPI) on a 3T-scanner. Methods: Fourteen volunteers underwent single breath hold coronary MRA with a MSG-EPI and
Autor:
Ryusuke Suzuki, Kenta Uekihara, Hironori Kikuchi, Sadahiro Yamamura, Kouichi Yokoyama, Eri Hayashida, Yuji Iyama, Takeshi Sugahara
Publikováno v:
The Journal of Japanese College of Angiology. 58:17-20
Autor:
Tomohiro Namimoto, Yuji Iyama, Hideaki Yuki, Seitaro Oda, Yasunori Nagayama, Masafumi Kidoh, Kenichiro Hirata, Yasuyuki Yamashita, Takeshi Nakaura, Narumi Taguchi, Daisuke Utsunomiya, Masataka Nakagawa, Yoshinori Funama
Publikováno v:
European Radiology. 28:1719-1730
To evaluate the image quality and lesion conspicuity of virtual-monochromatic-imaging (VMI) with dual-layer DECT (DL-DECT) for reduced-iodine-load multiphasic-hepatic CT. Forty-five adults with renal dysfunction who had undergone hepatic DL-DECT with
Autor:
Kazuhiro Katahira, Yasuyuki Yamashita, Daisuke Utsunomiya, Masafumi Kidoh, Seitaro Oda, Yuji Iyama, Ayumi Iyama, Takeshi Nakaura
Publikováno v:
Radiology. 284:153-160
Purpose To evaluate the image quality and interobserver reproducibility of unenhanced lumbar spinal computed tomography (CT) images reconstructed with iterative model reconstruction (IMR). Materials and Methods This prospective study was approved by