Clinical use of diodes and micro-chambers to obtain accurate small field output factor measurements
نویسندگان
چکیده
منابع مشابه
Measurements of output factors using different ionization chambers and build up caps
Background: The aim of this work was to study the output factors for Linac using different ionization chambers and build up caps. Materials and Methods: Output factors were measured for open square fields (3 × 3 cm to 40 × 40 cm) defined by collimator jaws for 6 and 15 MV photon beams from a Varian Clinac 2100C accelerator were measured. The measurements in air were performed using Com...
متن کاملSurvey of 5 mm small‐field output factor measurements in Australia
The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) held a comparison exercise in April 2016 where participants came to ARPANSA and measured the output factor of a nominal 5 mm cone attached to the ARPANSA Elekta Synergy (Elekta, Crawley, UK) linear accelerator. The goal of the exercise was to compare the consistency and methods used by independent medical physicists in meas...
متن کاملmeasurements of output factors using different ionization chambers and build up caps
background: the aim of this work was to study the output factors for linac using different ionization chambers and build up caps. materials and methods: output factors were measured for open square fields (3 × 3 cm to 40 × 40 cm) defined by collimator jaws for 6 and 15 mv photon beams from a varian clinac 2100c accelerator were measured. the measurements in air were performed using compact cyli...
متن کاملDetector comparison for small field output factor measurements in flattening filter free photon beams.
PURPOSE The applicability of various detectors for small field dosimetry and whether there are differences in the detector response when irradiated with FF- and FFF-beams was investigated. MATERIALS AND METHODS Output factors of 6 and 10 MV FF- and FFF-beams were measured with 14 different online detectors using field sizes between 10 × 10 and 0.6 × 0.6 cm(2) at a depth of 5 cm of water in is...
متن کاملDesigning of P controller to obtain desired time domain scenario of the output
One of the most applicable and simple controllers, which always attracts the researcherchr('39')s attention to obtain a proper closed-loop performance, is the P controller. Proper performance of a system defined in the presence of controller has been proposed with different expressions like rising time, settling time and maximum overshoot. But in the view of this paper, the proper performance o...
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ژورنال
عنوان ژورنال: Australasian Physical & Engineering Sciences in Medicine
سال: 2015
ISSN: 0158-9938,1879-5447
DOI: 10.1007/s13246-015-0334-9