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Chapter-9 Dose Distribution And Scatter Analysis

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Presentation on theme: "Chapter-9 Dose Distribution And Scatter Analysis"— Presentation transcript:

1 Chapter-9 Dose Distribution And Scatter Analysis
日期: 地點:高雄長庚RTO教室 劉任哲

2 Tumor chamber Measure  Ion chamber  Water phantom, Bragg-Gray ,…  Depth  PDD

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5 10*10 20*20 dm Dm(10) Dm(fs) Scatter factor of collimator and phamtom

6 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

7 100cm 10*10 20*20 dm Dm(10) 80cm SSD , Factor(PDD, Scp,) change

8 80cm 68cm Too many table

9 80cm 80cm Air Water Dd Dfs

10 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 ??

11 d Air Dr Dd Phantom 100cm 10*10 20*20 SAD

12 Dmax Da Phantom Air Ddm(Dmax) > Da

13 (2)BSF Db Ddm (1)ISF (4)PDD Dd Dfs (3)TAR

14 5*5 10*10 15*15 20*20 20*6 ?? ? 20 ? 6

15 (1) Contour (2) Contour (3) Contour


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