吸收劑量的測量

1、HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT吸收劑量測量的原理HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOT

2、HERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT吸收劑量的測量HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT空氣中吸收劑量的測量空氣中吸收劑量的測量AVQX1 HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT而吸收劑量則為： DaDa= X = X W/eW/e即： DaDa（J/kg)= = X X（R）2.58

3、10-4(C/kg/R)33.97(J/C) =0.87610-2（J/kgR）X X（R） DaDa （rad）= = 0.876（rad/R）X X ( R ) 即： DaDa = f = f X Xf f : 倫琴-拉德轉(zhuǎn)換因子，或照射量照射量- -吸收劑量轉(zhuǎn)換因子吸收劑量轉(zhuǎn)換因子。HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERA

4、PY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT介質(zhì)、設(shè)備和技術(shù)要求HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPART

5、MENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT介質(zhì)、設(shè)備和技術(shù)要求HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT介質(zhì)、設(shè)備和技術(shù)要求HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPART

6、MENTHBCH RADIOTHERAPY DEPARTMENT電離室的結(jié)構(gòu)與技術(shù)要求HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT適用于放射治療測量用的電離室的主要指標(biāo)HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHER

7、APY DEPARTMENT示值非線性HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT參考源及其應(yīng)用HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT應(yīng)用電離室劑量儀的注意事項HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT規(guī) 程 演 變HB

8、CH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT規(guī) 程 演 變 （ICRU）規(guī) 程 演 變 （AAPM）aircapencapairairwallenwallairwallwalliongasLLAAeWkNxN)/()/)(1 ()/()/()/( HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT規(guī) 程 演 變 （IAEA）HBCH RADIOTHERAPY

9、DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT規(guī) 程 演 變 （IAEA與ICRU的差異）HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT規(guī) 程 演 變 （W/e的變化）HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT

10、HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTn電離室校準(zhǔn)u輻射場：鈷-60射線或2MV X射線u滿足電子平衡鈷-60射線在水中的吸收劑量為： CeWanewen)/()/(anewenweWNRD)/()/( 鈷-60射線照射量-吸收劑量轉(zhuǎn)換因子CawCawanewenPPSSdSSeWC )/()/()/()/()/()/(射線質(zhì)量C（水中）C（組織中）鈷-6

11、00.950.944MV0.940.948MV0.930.9212MV0.920.9116MV0.910.9020MV0.900.8930MV0.890.87不同物質(zhì)在不同能量時的不同物質(zhì)在不同能量時的C值值對高能電子束，水中吸收劑量計算的標(biāo)準(zhǔn)公式為：CEawEPPSSdeWCZ )/()/(HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHE

12、RAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH

13、RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT術(shù) 語HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPA

14、RTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHER

15、APY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT電離室的有效測量點HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTM

16、ENT電離室的有效測量點HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT0.6HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT0.6HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT不同射線深度劑量特性的比較0100HBCH RADIOTHE

17、RAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT電離室校準(zhǔn)因子（ND）的確定HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT電離室校準(zhǔn)因子（ND）的確定HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT電離室校準(zhǔn)因子（ND）的確定HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENT電離室校準(zhǔn)因子（ND）的確定HBCH RADIOTHERAPY DEPARTMENTHBCH RADIOTHERAPY DEPARTMENTHBCH