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SU‐E‐T‐113: Measurement of the Cutout Output Factor on Ortho‐Voltage Unit Using EBT‐2 Model GafchromicTM Film

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 ...

Prediction of output factor, range, and spread-out Bragg peak for proton therapy

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

Dosimetric and mechanical characteristics of a commercial dynamic μMLC used in SRS

MM Galal, S Keogh… - Medical Physics, 2011 - link.aip.org
... For in-air output factor 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. ...

Monte Carlo simulation of small field electron beams for small animal irradiation

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 output factor) but with minimum effect on the relative lateral distribution. Keywords:
Radiotherapy; Monte Carlo; Small electron fields; Small animal irradiation. Article Outline. ...

The elasticity of derived demand, factor substitution, and product demand: Corrections to Hicks' Formula and Marshall's Four Rules

[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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