Calibration factor analysis in vivo rectal dosimetry of brachytherapy using EBT2 film technique
| Autor: | Yue-lin Yang, 楊岳霖 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 EBT2 Gafchromic film is tissue equivalence and energy independence, this characteristic can makes dose conversion and decrease error in different energy by using calibration curve. This study use EBT2 Gafchromic film manufactured by ISP and Epson 1680 flatbed scanner. Using Ir-192 source to irradiated EBT2 film and obtained the calibration curve, compare the calibration curve of Ir-192 with 6 MV photon beam. Dose calculation can be used silicon rod and EBT2 film to corrected PTW T9112 rectal detector and to acquired the correction factor. Result show that two different calibration curves of Ir-192 source and 6 MV photon beam are not significant different. Applying EBT2 film combine with silicon rod can achieved the axial flat dose to corrected PTW T9112 rectal detector. The correction factor is 2.98×10^7cGy/C to 3.99×10^7cGy/C in solidwater phantom and 2.98×10^7cGy/C to 3.2×10^7cGy/C in acrylic phantom. This study provided procedures for measure treatment dose and calibrate the other detector by EBT2 film. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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