نتایج جستجو برای: beam gantry
تعداد نتایج: 114050 فیلتر نتایج به سال:
GaToroid is a concept of toroidal gantry for hadron therapy under investigation at CERN. It makes use the magnetic field between each pair coils to steer and focus particle beams down patient. This peculiar requires detailed studies on tracking beam optics optimize winding geometry explore properties system. The work presented in this manuscript focused features system protons, specifically des...
A laminated beam-spot camera of length 20 cm and effective cross-sectional area 2.5 cm × 3 cm was designed and constructed for the measurement of X-ray beam-spot sizes on different models of Siemens accelerators. With the accelerator gantry at 180° and camera positioned on an accessory tray holder, an XV film placed in contact with the camera at the distal end of it detected those X-rays that w...
Indiana University has designed and finished construction of the Midwest Proton Radiotherapy Institute (MPRI) [1] consisting of one treatment room with two fixed horizontal beam lines and two treatment rooms with isocentric gantries. The first treatment room has been operating since February 2004, while the first Gantry treatment room has been in use treating patients since April 2007. The prot...
PURPOSE The aim of this work was to comprehensively evaluate a new large field ion chamber transmission detector, Integral Quality Monitor (IQM), for online external photon beam verification and quality assurance. The device is designed to be mounted on the linac accessory tray to measure and verify photon energy, field shape, gantry position, and fluence before and during patient treatment. ...
PURPOSE We investigate the impact of a treatment couch and its modeling in a treatment planning system on accurate dose delivery in Volumetric Modulated Arc Therapy (VMAT). METHODS A cone-beam CT of a Varian couch on a Varian Clinac 21EX unit, consisting of a carbon-fiber imaging couch top and supporting rails, was acquired, and a couch model was created in Philips Pinnacle 9.0 TPS based on t...
Background: The purpose of this study was to investigate the various gantry angle and SSD dependencies of TLD and MOSFET dosimeters. Materials and Methods: LiF (Mg) TLD and MOSFET were used in this study. Dosimeter systems were calibrated and then irradiated at various gantry angle and SSD by applying 6 MV photon energy. Results: Based on the results, MOSFET changes were found to be in 2% range...
The carbon-ion radiotherapy (RT) with HIMAC has been conducted since 1994, and the accumulated number of patients treated exceeded 7,500 in July 2013. On the basis of the HIMAC experience, NIRS developed a compact carbon-ion RT facility in order to boost the carbon-ion RT in Japan, and a pilot facility of this work was constructed and conducted at the Gunma University. Toward the further develo...
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