Effect on dose owing to source displacement in coronary endovascular brachytherapy.
- Author:
Zhi-yong XU
1
;
Liang-an ZHANG
;
Shu-yu YUAN
;
Guang-fu DAI
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Brachytherapy; methods; Coronary Restenosis; radiotherapy; Coronary Vessels; radiation effects; Iridium Radioisotopes; therapeutic use; Radiotherapy Dosage
- From: Acta Academiae Medicinae Sinicae 2003;25(2):193-196
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the effect on the dose distribution of source position displacement with the target region margin in catheter-based 192Ir line source endovascular brachytherapy.
METHODDose rate distribution along longitudinal axes was estimated by the formula recommended by AAPM No.60 and No. 43.
RESULTSIn the two cases of source displacement (1.1 and 5 mm) doses of target region margin was decreased dramatically (at most 53.9% and 565.8% respectively) were compared to that of no source displacement, and the affected range was 6 mm and 9 mm respectively.
CONCLUSIONSource displacement will lead to the decrease of dose in target region margin.
