Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Takeshi, Hiraoka"'
Publikováno v:
Composites Science and Technology. 202:108595
Application of cellulose microfibers as a reinforcing agent for high-performance polyurethane composites is rarely mentioned because the inherent hydrophilicity combined with the adverse aspect ratio of the fibers cause difficulties in dispersion wit
Autor:
Yoshikazu Nishimura, Tetsu Nishikawa, Takeshi Hiraoka, Nobuhiko Takai, Yasushi Ohmachi, Yuka Ishida, Yoshiya Shimada, Toshiaki Ogiu
Publikováno v:
Journal of Radiation Research. 52:257-263
Neutrons/Fetus/Neurobehavioral effects. Epidemiological studies have revealed that radiation causes brain development abnormalities in at omic bomb survivors exposed in utero. Rat and mouse studies have also shown that prenatal exposure to low-linear
Autor:
Hans Bichsel, Takeshi Hiraoka
Publikováno v:
International Journal of Quantum Chemistry. 36:565-574
In cancer therapy with fast charged particles, the energy deposition (“dose”) near the end of the range of the particles must be determined with an error of less than 2%. The dose is strongly influenced by straggling and multiple scattering effec
Publikováno v:
Radiation Medicine. 24:647-652
The purpose of this study was to evaluate the production design of a novel breast phantom, which has adjustable breast glandular fractions and potential application in the mammography quality assurance/quality control system. The breast phantom was b
Autor:
Tatsuya Fujisaki, Takeshi Hiraoka, Sakae Kinase, Shuichi Tuda, Hidetoshi Saitoh, Fusao Takashima, Kimiaki Saito, Kaoru Sato
Publikováno v:
Japanese Journal of Health Physics. 41:158-168
The expert committee on development and utilization of phantoms had activities from April, 2004 to March, 2006 sponsored by the Japan Health Physics Society. The purpose of the committee was to accumulate and share the latest information concerning p
Autor:
Yuka Ishida, Shinji Fushiki, Toshiaki Ogiu, Takeshi Hiraoka, Tsuyoshi Hamano, Yasushi Ohmachi
Publikováno v:
Journal of Toxicologic Pathology. 17:63-68
Exposure to radiation during brain development stage cause microcephaly or mental retardation. Although X- and gamma-rays induced cerebral hypoplasia in rodents has been well characterized, little is known about such effects of neutrons. To examine t
Autor:
Kouichi Shibayama, Shinroku Morita, S. Sato, Takeshi Hiraoka, Hirohiko Tsujii, Tatsuaki Kanai, Shigeo Furukawa, Takashi Nakano
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 210:316-324
A computed tomography (CT) based treatment planning system of proton beam therapy was established specially for ocular melanoma treatment. A technique of collimated proton beams with maximum energy of 70 MeV are applied for treatment for ocular melan
Autor:
Akifumi Fukumura, Naruhiro Matsufuji, Kiyomitsu Kawachi, Yasuyuki Futami, Y Kaizuka, Takeshi Hiraoka, Tatsuaki Kanai, M. Takeshita, Hiromi Tomura, Kaname Omata, G H Hartmann
Publikováno v:
Physics in Medicine and Biology. 43:3459-3463
To verify international uniformity in carbon beam dosimetry, an intercomparison programme was carried out at the heavy ion medical accelerator (HIMAC). Dose measurements with ionization chambers were performed for both unmodulated and 6 cm modulated
Autor:
Yasuyuki Futami, Yutaka Noda, T. Murakami, Tatsuaki Kanai, Takeshi Hiraoka, Akifumi Fukumura, Kaname Omata, Naruhiro Matsufuji
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 416:148-151
In ion-beam therapy, it is necessary to measure the range of the beams in a tissue-equivalent material. We demonstrate a simple method for the range measurement, using a bare plastic scintillator block and a CCD camera. This method presents an instan
Publikováno v:
Medical Physics. 20:135-141
Using Bragg ionization curves, measurements of the average stopping power of organic polymers relative to that of water have been made for 70 MeV protons losing about 30 MeV in the absorbers. By comparing calculated curves to experimental ones, I‐v