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Published byAugust Beasley Modified over 5 years ago
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Chapter-9 Dose Distribution And Scatter Analysis
日期: 地點:高雄長庚RTO教室 劉任哲
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Tumor chamber Measure Ion chamber Water phantom, Bragg-Gray ,… Depth PDD
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10*10 20*20 dm Dm(10) Dm(fs) Scatter factor of collimator and phamtom
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5*5 10*10 15*15 20*20 Scp 1 2 dm 0.95 1.0 1.03 1.08 Scp 1.0 5*5 10*10 15*15 FS
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100cm 10*10 20*20 dm Dm(10) 80cm SSD , Factor(PDD, Scp,) change
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80cm 68cm Too many table
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80cm 80cm Air Water Dd Dfs
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10*10 20*20 Air Air Da(10) Da(20) Dd 由游離腔量測 Scp校正 (不用Phantom) TAR(20*20,5cm) But High Energy …. Da(10) Ion Chamber Size ??
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d Air Dr Dd Phantom 100cm 10*10 20*20 SAD
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Dmax Da Phantom Air Ddm(Dmax) > Da
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(2)BSF Db Ddm (1)ISF (4)PDD Dd Dfs (3)TAR
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5*5 10*10 15*15 20*20 20*6 ?? ? 20 ? 6
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(1) Contour (2) Contour (3) Contour
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