نتایج جستجو برای: couch insert

تعداد نتایج: 12366  

Journal: :Physics in medicine and biology 2007
Martin J Butson Tsang Cheung Peter K N Yu

It is well known that a skin dose from high-energy x-ray radiation varies with the angle of beam incidence or the presence of a radiotherapy linear accelerator couch top material. This note investigates changes produced to the skin dose from a Varian carbon fibre grid couch top at differing angles of incidence for 6 MV x-rays as is often the case clinically. Results have shown that the skin dos...

Journal: :The Proceedings of the Nutrition Society 1960
A M BROWN M J COOK W LANE-PETTER G PORTER A A TUFFERY

Craft, W. A., M’Elroy, C. H. & Penquite, R. (1926). Poult. Sci. 5, 187. Cravens, W. W., McGibbon, W. H. & Sebesta, E. E. (1944). Anat. Rec. 90, 55. Cruickshank, E. M. (1940-1). Nutr. Abstr. Rev. 10, 645. Dann, W. J. & Handler, P. (1941). J . biol. Chem. 140, 935. Davis, H. J., Norris, L. C . & Heuser, G. F. (1938). Poult. Sci. 17, 81. Ellis, N . R., Miller, D., Titus, H. W. & Byerly, T. C. (193...

1998
Gerhard Fischer

The fundamental challenge for human-computer interaction (HCI) is to invent and design a culture in which humans can express themselves and engage in personally meaningful activities. Cultures are substantially defined by their media and tools for thinking, working, learning, and collaborating. New media change (1) the structure and contents of our interests, (2) the nature of our cognitive and...

2017
Amy Yu Benjamin Fahimian Lynn Million Annie Hsu

Purpose  Radiotherapy treatment planning of extended volume typically necessitates the utilization of multiple field isocenters and abutting dosimetrically matched fields in order to enable coverage beyond the field size limits. A common example includes total lymphoid irradiation (TLI) treatments, which are conventionally planned using dosimetric matching of the mantle, para-aortic/spleen, and...

Journal: :Biomedizinische Technik. Biomedical engineering 2016
Alexander Jöhl Stephanie Lang Stefanie Ehrbar Matthias Guckenberger Stephan Klöck Mirko Meboldt Marianne Schmid Daners

Tumor motion during radiation therapy increases the irradiation of healthy tissue. However, this problem may be mitigated by moving the patient via the treatment couch such that the tumor motion relative to the beam is minimized. The treatment couch poses limitations to the potential mitigation, thus the performance of the Protura (CIVCO) treatment couch was characterized and numerically modele...

Journal: :Communications on Applied Electronics 2017

Journal: :IEEE Transactions on Applied Superconductivity 2013

2017
Hiroshi Watanabe Kimiya Noto Tomokazu Shohji Yasuyoshi Ogawa Toshioh Fujibuchi Ichiro Yamaguchi Hitoshi Hiraki Tetsuo Kida Kazutoshi Sasanuma Yasushi Katsunuma Takurou Nakano Genki Horitsugi Makoto Hosono

The goal of this study is to develop a more appropriate shielding calculation method for computed tomography (CT) in comparison with the Japanese conventional (JC) method and the National Council on Radiation Protection and Measurements (NCRP)-dose length product (DLP) method. Scattered dose distributions were measured in a CT room with 18 scanners (16 scanners in the case of the JC method) for...

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