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Featured researches published by Seiichi Mimura.


Optical Science and Technology, the SPIE 49th Annual Meeting | 2004

DQE evaluation of a full-field digital mammography system

Hans Roehrig; Kunal Gandhi; Jiahua Fan; Ananth Poolla; Seiichi Mimura

Physical characteristics necessary to calculate the Detective Quantum Efficiency of a clinically used flat panel imager for full-breast digital mammography are presented. Objective quantities such as modulation transfer function (MTF), noise power spectrum (NPS) and detective quantum efficiency (DQE) have been evaluated. The X-ray photon fluence was determined using Half-Value-Layer (HVL) techniques. At an X-ray beam characterized by 28 kVp, Mo-anode and Mo filter as well as beam hardening by 5 cm Lucite, the detector is practically linear with x-ray exposure at least up to 33 mR. At an exposure of 33 mR and close to zero spatial frequency the DQE is in the vicinity of 60%.


Oncology Reports | 2009

In vitro experimental study of the relationship between the apparent diffusion coefficient and changes in cellularity and cell morphology

Yoshitsugu Matsumoto; Masahiro Kuroda; Ryohei Matsuya; Hirokazu Kato; Koichi Shibuya; Masataka Oita; Atsushi Kawabe; Hidenobu Matsuzaki; Jun Ichi Asaumi; Jun Murakami; Kazunori Katashima; Masakazu Ashida; Takanori Sasaki; Tetsuro Sei; Susumu Kanazawa; Seiichi Mimura; Seiichiro Oono; Takuichi Kitayama; Seiji Tahara; Keiji Inamura


International Journal of Oncology | 2009

A new phantom using polyethylene glycol as an apparent diffusion coefficient standard for MR imaging

Ryohei Matsuya; Masahiro Kuroda; Yoshitsugu Matsumoto; Hirokazu Kato; Hidenobu Matsuzaki; Jun Ichi Asaumi; Jun Murakami; Kazunori Katashima; Masakazu Ashida; Takanori Sasaki; Tetsuro Sei; Kengo Himei; Kuniaki Katsui; Norihisa Katayama; Mitsuhiro Takemoto; Susumu Kanazawa; Seiichi Mimura; Seiichiro Oono; Takuichi Kitayama; Seiji Tahara; Keiji Inamura


Acta Medica Okayama | 1992

Report of a study using phantom materials, and clinical experience with simultaneous radio-hyperthermotherapy.

Masahiro Kuroda; Keiji Inamura; Seiji Tahara; Seiichi Mimura; Yasutaka Mikami; Shoji Kawasaki; Yoshio Hiraki


Acta Medica Okayama | 2012

In Vitro Assessment of Factors Affecting the Apparent Diffusion Coefficient of Ramos Cells Using Bio-phantoms

Kazunori Katashima; Masahiro Kuroda; Masakazu Ashida; Takanori Sasaki; Takehito Taguchi; Hidenobu Matsuzaki; Jun Murakami; Yoshinobu Yanagi; Miki Hisatomi; Marina Hara; Hirokazu Kato; Yuichi Ohmura; Tomoki Kobayashi; Susumu Kanazawa; Sosuke Harada; Mitsuhiro Takemoto; Seiichiro Ohno; Seiichi Mimura; Jun Ichi Asaumi


Japanese Journal of Radiological Technology | 2000

Clinical Evaluation of Shoulder Kinematic MRI Using an Open-type System

Seiichiro Ohno; Izumi Togami; Nobuya Sasai; Takuichi Kitayama; Yoshihiro Ohkawa; Seiichi Mimura; Mitsugi Honda; Tadashi Arioka; Noriaki Akagi; Fumie Kimura; Yasuki Morioka


Japanese Journal of Hyperthermic Oncology | 1992

Clinical Introduction of Simultaneous Radiohyperthermotherapy

Masahiro Kuroda; Keiji Inamura; Seiji Tahara; Seiichi Mimura; Junichi Asaumi; Yasutaka Mikami; Shoji Kawasaki; Yoshio Hiraki


Japanese Journal of Radiological Technology | 2003

Non-contrast Intracranial MR Venography with 3D-Phase Contrast Imaging : Optimization of Presaturation Pulse and Velocity Encoding : Report on the ECR2003(European Congress of Radiology)

Seiichi Mimura; N. Iwata; T. Yamane; Y. Hirata; F. Tanino; S. Sugihara; T. Kinoshita; T. Ogawa


Japanese Journal of Radiological Technology | 1997

Clinical Application of the resistive magnet open type MRI system

Takuichi Kitayama; Yoshihiro Ohkawa; Fumie Kimura; Seiichi Mimura; Mitsugu Honda; Keiko Tanimoto; Yasuki Morioka; Izumi Togami


Japanese Journal of Radiological Technology | 1996

Evaluation of two-dimensional measurement of the focal spot of X-ray tube

Seiichi Mimura; Noriaki Akagi; Shigefumi Kadohisa; Mitsugu Honda; Hideki Aoyama; Keiko Tanimoto; Tatsuya Inoue; Yoshihiro Ohkawa; Keiji Inamura; Takuichi Kitayama; Yasuki Morioka; Yoshitada Nakagiri

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