학술논문
使用照野中之照野以及不規則體表補償器於乳癌病人放射治療之假體皮膚劑量量測 / The Measured Skin Dose of the Simulated Phantom for Breast Cancer Patients Treated with Field-in-Field (Fif ) and Irregular Surface Compensator (Isc )
Document Type
Article
Author
傅筱如 / Hsiao-Ju Fu; 張瀞予 / Ching-Yu Chang; 蔡維達 / Wei-Ta Tsai; 曾玉華 / Yuk-Wah Tsang; 張志嘉 / Chih-Chia Chang
Source
放射治療與腫瘤學 / Therapeutic Radiology and Oncology. Vol. 22 Issue 2, p139-146. 8 p.
Subject
Language
繁體中文
ISSN
1023-988x
Abstract
Purpose: This reasearch was focused on the measured surface dose of the simulated phantom for breast cancer patients treated with field-in-field (FIF) and irregular surface compensator (ISC) and the reliable measured tools to evaluate the skin dose of breast cancer patients. Materials and Methods: This experiment adopted 0.1mm ultrathin thermoluminescent dosimeters (ultrathin TLD) and ISP Gafchromic EBT film as the measured tool to establish the characteristics. Superficial doses of home-made breast on anthropomorphic Rando phantom were measured. FIF and ISC plans with a prescribed dose of 180 cGy were designed on this phantom using an Eclipse treatment planning system and using two measured tools to measure the absolute surface dose. Result: In this experiment the variance coefficient of TLD film was within 3%. The reading values and delivered doses were in a good linear relationship. The points on calibration curve of Gafchromic film were within 1% and in a stable performance. Mean surface measured doses of FIF and ISC with the EBT film and TLD film were 108.74 ± 14.86 cGy, 107.35 ± 15.93 cGy and 103.19 ± 12.91 cGy, 102.09 ± 10.02 cGy, respectively. The error between EBT film and TLD film for the inner, middle, outer, upper, lower regions of home-made breast and the total mean dose of FIF was 5.17%, -3.45%, 1.58%, 1.27%, -0.55% and 1.3%, respectively; the error between EBT film and TLD film for the inner, middle, outer, upper, lower regions of home-made breast and the total mean dose of ISC was 1.86%, 2.94%, 8.3%, -3.44%, -5% and 1.08%, respectively. Conclusion and Discussion: From the experimental results, ultrathin TLD and EBT film can be adopted as the measured tools for surface dose of breast cancer patients. The future work for this research could gather statistics of the skin reactions indeed affected by the skin dose received from radiation for clinical applications. To evaluate severity of skin reaction and measure most accurate skin dose, and this data can be used references for skin reaction gradings.