KMID : 0384620070180010013
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Korean Journal of Medical Physics 2007 Volume.18 No. 1 p.13 ~ p.19
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Determination of Output Factors for the Gamma Knife using a Radiophotoluminescent Glass Rod Detector
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Ra Jung-En
Suh Weon-Seop Shin Dong-Oh Kim Hee-Sun Suh Tae-Suk
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Abstract
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The purpose of study Is to Investigate whether glass rod detector (GRD) would be suitable for dosimeter of radiotherapy units. A GRD Is used for the measurement of the ou4put factors and x-axis beam profiles from Gamma Knife. The output factors measured with GRD from the 14, 8 and 4mm collimators relative to the 18mm collimator are 0.980{\pm}0.013,;0.949{\pm}0.013;and;0.872{pm}0.012, respectively. The output factors obtained with a GRD are within 1.0% In good agreement with the values recommended by the manufacture. The full width at half maximum (FWHM) of x-axis beam profiles measured with GRD are 5.9mm at a 4mm collimator.
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KEYWORD
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Radiophotoluminescent glass rod detector, Output factor, x-axis dose profile, FWHM
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