Comparison of Skin dose Measurement Using Glass Dosimeter and Diode for Breast Cancer Patients.
- Author:
Young Eun KO
1
;
Sung Ho PARK
;
Byoung Joon CHOI
;
Hee Sun KIM
;
Young Ju NOH
Author Information
1. Department of Radiation Oncology, Ulsan University Hospital, University of Ulsan College of Medicine, Korea. radonc@hanmail.net
- Publication Type:Original Article
- Keywords:
Skin dose;
Diode;
Glass dosimeter;
Breast cancer
- MeSH:
Breast;
Breast Neoplasms;
Glass;
Humans;
Skin
- From:Korean Journal of Medical Physics
2008;19(1):9-13
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to measure the skin dose using the glass dosimeter and diode and to compare those measurements to the planned skin dose from the treatment planning system. For the reproducibility of the glass dosimeter (ASAHI TECHNO GLASS CIRPORATION, Japan), the same dose was irradiated to 40 glass dosimeters three times, among which 28 with the reproducibility within 3% were selected for the use of this study. For each of 27 breast cancer patients, the glass dosimeters and diodes were attached to 4 different locations on the skin to measure the dose during treatment. All the patients received one fraction of 180 cGy each. The maximum difference of measurements between the glass dosimeter and diode at the same location was 3.2%. Comparing with the planned skin dose from the treatment planning system (Eclipse v6.5, Varian, USA), the dose measured by the glass dosimeter and the diodeshowed on an average 3.4% and 2.3% difference, respectively. The measured doses were always less than the planned skin dose. This may be due to the specific errors of both detectors. Also, the difference may be caused by the fact that since the skin where the detectors were attached is pretty moveable, it was not fix the detectors on the skin.
