Measurements and simulations of focused beam for orthovoltage therapy
نویسندگان
چکیده
منابع مشابه
Measurements and simulations of focused beam for orthovoltage therapy.
PURPOSE Megavoltage photon beams are typically used for therapy because of their skin-sparing effect. However, a focused low-energy x-ray beam would also be skin sparing, and would have a higher dose concentration at the focal spot. Such a beam can be produced with polycapillary optics. MCNP5 was used to model dose profiles for a scanned focused beam, using measured beam parameters. The potenti...
متن کاملInfrared measurements and simulations of metal meshes in a focused beam
Infrared transmittance measurements of quasioptical filters are often restricted to a focused beam due to the optical design of the spectrometer. In contrast, numerical simulations assume an incident plane wave, which makes it difficult to compare theory with experimental data. We compare transmittance measurements with numerical simulations of square arrays of circular holes in 3-lm thick Cu s...
متن کاملOrthovoltage intraoperative radiation therapy for pancreatic adenocarcinoma
PURPOSE To analyze the outcomes of patients from a single institution treated with surgery and orthovoltage intraoperative radiotherapy (IORT) for pancreatic adenocarcinoma. METHODS We retrospectively reviewed 23 consecutive patients from 1990-2001 treated with IORT to 23 discrete sites with median and mean follow up of 6.5 and 21 months, respectively. Most tumors were located in the head of ...
متن کاملComparison of the effectiveness of “Solution-Focused Brief Therapy” and “Compassion-Focused Therapy” on Ruminative Responses of Couples with Depression
Introduction: Ruminant responses are one of the most important cognitive feature in people with depression and cause disruption of thinking, problem solving and social relationships. The aim of this study was to compare the effectiveness of "Solution-Focused Brief Therapy" and "Compassion-Focused Therapy" on ruminant responses of couples with depression. Methods: The method of the present stu...
متن کاملPreparation of bismuth nanowire encased in quartz template for Hall measurements using focused ion beam processing
Forming electrodes on opposite sides of an individual bismuth nanowire was attempted to prepare for Hall measurements. Although a 1-mm-long bismuth nanowire which is completely covered with a quartz template has been successfully fabricated to prevent oxidation, it is very difficult to attach Hall electrodes on the opposite sides of the nanowire due to the quartz covering. One side of the cylin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Medical Physics
سال: 2014
ISSN: 0094-2405
DOI: 10.1118/1.4866224