Radiation dosage assessment of CT guided implantation of ¹²⁵I seeds for medical personnel

ObjectiveThis study was conducted to assess the dosage of radiation associated with CT guided implantation of ¹²⁵I seeds in medical personnel at different distances with or without radiation protection.

MethodsAmbient dose equivalent was measured by gamma ray radiation detector after implantation of ¹²⁵I seeds with or without protection at different distances(5 cm, 10 cm, 1 m, 2 m, and 3 m) into 50 patients. Radiation dose received by medical personnel was assessed.

ResultsThe ambient dose equivalents were(1091.75±10.53), (1055.50±31.68), (123.45±20.83), (20.95±6.10), and(7.78±3.24) μSv/h in 5 cm, 10 cm, 1 m, 2 m, and 3 m. The ambient dose equivalents were(1.36±2.03), (0.97±1.48), (0.46±0.63), (0.29±0.34), and(0.14±0.12) μSv/h with 0.5 mmPb lead clothes at distances of 5 cm, 10 cm, 1 m, 2 m, and 3 m. The ambient dose equivalent was statistically significant with or without 0.5 mm Pb lead clothes (F=183.718, 71.202, 217.411, 184.169, 108.222, all P < 0.05).

ConclusionsMedical personnel should take appropriate distance protection during ¹²⁵I seeds implantation. Ambient dose equivalent can be significantly reduced by wearing 0.5 mmPb lead clothes.