Test of dose distribution of palatal denture applicator containing 125I seeds

VernacularTitle:腭部125 I粒子义齿基托布源器的剂量分布研究
Author: Ming-Wei HUANG ¹ ; Jing TAN ; Jie ZHANG ; Hong-Zhi ZHANG ; Guang-Yan YU ; Jian-Guo ZHANG
Author Information

1. 北京大学口腔医学院口腔医院
Keywords: Radiotherapy dosage; Iodine radioisotopes; Dental applicator
From: Chinese Journal of Stomatology 2010;45(9):549-552
CountryChina
Language:Chinese
Abstract: Objective To measure the dose distribution (tissue absorbed dose) of palatal denture applicator containing 125I. Methods Simulated model of head and neck was used to wear the palatal dental applicator containing I for the postoperative brachytherapy of a simulated tumor at a diameter of 2 cm in the palate. The denture contained 11 125I seed with radioactivity of 29. 6 MBq per seed. The prescribed dose (edge matched dose) was 80 Gy. The absorbed dose in the simulated target and its adjacent area was measured by thermoluminescence dosimeters. Results The dose in the target area reached the value of treatment needs, and the dose absorbed by tissue around the target was lower except tongue. Conclusions Using palatal denture applicator containing 125I for postoperative brachytherapy of malignant tumors of palate can get satisfied dose distribution, but the tongue needs to be protected.