3.1 General information
A total of 41 lesions in 31 patients were assessed. General information of the patients and tumors was shown on Table 1. The median age of the study cohort was 52 (range, 25 – 73, average 52.5) years old. 34.1% lesions (14/41) with RSI-BT were assisted by 3D-PT. The median radioactivity of 125I radioactive seeds was 0.43 (range, 0.22-0.79, average 0.61) mCi. The median number of125I radioactive seeds was 24 (3-83, average 37). The median value of D90 was 118.5 (62.4-246, average 136.2) Gy.