L Liang, N Tomic, S Devic, J Seuntjens… - Medical Physics, 2011 - link.aip.org Purpose: In this study, we evaluate feasibility of using EBT‐2 model GafchromicTM film to measure patient specific cutout output factors on an ortho‐voltage treatment machine. Methods: A Gulmay Orthovoltage D3225 unit was used to produce clinical beams in kV range from 50 kVp to ...
DW Kim, YK Lim, SH Ahn, J Shin, D Shin… - Medical Dosimetry, 2011 - Elsevier In proton therapy, patient quality assurance (QA) requires measuring the beam range, spread-out Bragg peak (SOBP), and output factor. If these values can be predicted by using sampling measurements or previous QA data to find the correlation between beam setup ... Cited by 2 - Related articles - All 4 versions
MM Galal, S Keogh… - Medical Physics, 2011 - link.aip.org ... For in-air outputfactor measurements, 0.2 cm of brass was placed above the photon diode as build-up.Results: Measurements of mechanical parameters gave values of 0.05 cm (SD 0.035) for the average leaf position accuracy for different gantry angles and after stress test. ...
CC Lee, AM Chen, CJ Tung… - Radiation Measurements, 2011 - Elsevier ... As for the photon jaw setting, it has great impact on the absolute output of different field size setting (ie outputfactor) but with minimum effect on the relative lateral distribution. Keywords: Radiotherapy; Monte Carlo; Small electron fields; Small animal irradiation. Article Outline. ...
[PDF] from econstor.euRS Chirinko… - Labour Economics, 2011 - Elsevier ... elasticity of substitution between factors a and b defined as follows, 3 ab ab (ff ) / (fx), (2a) () aa bb (da / a) (db / b) / (dp / p ) (dp / p ) ,= (2b) ()() ab d log(a / b) / d log(p / p )= . (2c) Both and are fixed parameters that determine the functional relation between factor inputs and output. ... Cited by 6 - Related articles - All 15 versions
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