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KMID : 0357520160390040595
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Journal of Radiological Science and Technology
2016 Volume.39 No. 4 p.595 ~ p.600
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Monte Carlo Simulation for Development of Diagnostic Multileaf Collimator
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Han Su-Cheol
Park Seung-Woo
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Abstract
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The diagnostic multileaf collimator(MLC) was designed for patient dose reduction in diagnostic radiography We used monte carlo simulation code (MCNPX, LANL, USA) to evaluate efficiency of shielding material for making diagnostic MLC as preliminary study. The diagnostic radiography unit was designed using SRS-78 program according to tube voltage (80,100,120 kVp) and acquired energy spectrums. The shielding material was SKD11 alloy tool steel that is composed of 1.6% carbon(C), 0.4% silicon(Si), 0.6% manganese (Mn), 5% chromium (Cr), 1% molybdenum(Mo) and vanadium(V). The density of it was 7.87 g/cm.Using tally card 6, we calculated the shielding efficiency of MLC according to tube voltage. The results was that 98.3% (80 kVp), 95.7 %(100 kVp), 93.6% (120 kVp). We certified efficiency of diagnostic MLC fabricated from SKD11 alloy steel by monte calro simulation. Based on the results, we designed the diagnostic MLC and will develop the diagnostic MLC for reduction of patient dose in diagnostic radiography.
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KEYWORD
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Diagnostic multileaf collimator , Monte carlo simulation , Dose reduction , Diagnostic radiography
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