( ) k D,X k Q 01 D air = colkair kh katt km kcel D air = colkair katt km kcel Wair W = M NC kh katt km kcel air = M N c katt km
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1 ( ) D,X Q 01 D air = colkair h D air = colkair Wair W = M NC h air = M N c e e Dair Wair D N D, air = = NC h air Wair N D, air = = Nc M e M e W air Wair Dc = NC M h Dc = N c M e e L Pwall Pcav Pdis Pcel L ρ Pwall Pcav Pdis Pcel w,air 60 Co ρ w,air 60 Co D W D c air c Wair N D,w = = N C h att m N cel D,w = = N c att m cel M e M e L L Pwall Pcav Pdis Pcel Pwall Pcav Pdis Pcel ρ w,air 60 ρ w,air 60 Co Co N D,w W N air D,w Wair D, X = = h D, X = = att m cel N e N e C W air W air c 1
2 W air / e 0.71% ( ) 102 A /36.7= W air D,X 30) 60 Co A4.5 m 0.8% NE %0.6% C-552 Capintec PR-06C 0.8% PMMA PTW NE2505/3B 0.6 A NE
3 105 A4.4 3
4 106 A A4.5 9 AAPM TG-51 3) SSD 100 cm AAPM TG-51 3) SSD 100 cm, 106 A PDD (10) PDD (10)X PDD (10)X 11 TPR20,10 5A5.4 TPR20,10 (A4-19) TPR20,10 PDD (10)X 505 cm ( 301 cm) 1 mm 20% 10 cm PDD (10)Pb PDD (10)Pb x PDD (10)X 4
5 505 cm PDD 10 X = PDD 10 PDD (10)Pb(50)73% ( ) ( ) Pb(50) 301 cm PDD ( 10) X = PDD( 10) Pb(30) PDD (10)Pb(30)71% PDD (10)Pb PDD (10)XPDD (10)Pb ( L ρ ) = ( ( 10) ) ( L ρ ) = PDD( ) X w, air PDD w, air 10 (A4-18) (A4-18) PDD (10)65% PDD (10)X65% PDD (10)= ytpr20,10 80% x TPR20,10 TPR = x 20, x 1.056x x 3 (A4 19) 110 A4.8c 5
6 110 A4.8 ) 6
7 7
8 8
9 113 7 (A4-24) P = exp( 0. R ) = exp( 0.27 R ) cav A4-11 Marus Q 50 P cav 50 A4-11Marus R Marus A4-12 Marus A4-12Marus R Marus M raw M raw, pl + M raw,pl M raw,pl raw M + M raw M raw M raw, pl M raw 9
10 () M raw, pl M raw TPR MV 20 TPR 20,10 MV TPR (4) TPR A14.1 λ λ (MV) = x x x (4MV λ 18MV) x x 10
11 171 A d C d c D C D c cel 28 6 P wall P wall 60 Co PDD PDD 52 3 A4.8a~b A4.8a~c Tp TP
12 TMRd c,a TMRd c,a PDDd c,a 0 PDDd c,a 0 60 PDDd c,a 0 PDDd c,a V 145V A4.8a~b A4.8a~c PDDd c,a 0 PDDd c,a TMRd c,a TMRd c,a DMU DMU d c,pl =d c/cpl d c,pl =d c /c pl nc MU -1 nc 76 1 M Q = M 1 pl M Q = M 1 h pl = =3.027 Gy = =3.037 Gy Gy Gy (A1-14) e e W W W W 95 (A1-15) e e W W h W air A5.3 A A5.4 A (A4-21) P dis 1 D = 1 In 100 D ( d d ) eff p A4.7 TMR TPR P wall,+s /P wall P wall /P wall+ s P dis 1 D = 1+ In 100 D ( d d ) p eff
13 116 A4.12 E2571 Farmer NE2571 Farmer 117 A4.13 A5.3 A A4.13 A5.4 A a1 a 8 a0 a A5-6 A5-8 A5-10 A A P ion s 138 (A7-8) 2 4 ' ' 2 1 d q 1 d q f = 1 = 1 f = 1 = V 6 6 V A9.2 (MU) (MV) rd 3 rd 163 A13.1 Solid Solid Plastic Solid Solid Plastic WTI RMI-457 water water water 163 A13.1 Virtual Tough Poli- WE 211 WTI RMI-457 Virtual Tough Poliwater water styrene WE A15.1 R p 173 A15.1 depth (cm) depth (mm) 176 (A16-7) p air N D,w Mpps 1 1 p airn c Mpps N D,W N c 177 A d/r 50 A ) d/r 50 A ) 186 A17.4 TPR =0.676 TPR = A17.6 TPR =0.730 TPR = A17.8 TPR =0.762 TPR = A17.9 TPR =0.774 TPR =0.775 Nc c 13
Step1 Excel Excel book TMR Excel TMR ( ) PDD TMR RTP RTP PDD TMR Excel RTP PDD TMR 10cm 5611cm TMR 1000 P089 Fig347 TMR 2
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