Abstract

Background: The use of CT scan which is recognized as a high radiation dose modality has increased substantially over the past decade regardless to the high radiation levels received by patients. In CT scan, the potential damage from an absorbed dose during CT scan depends on the dose of radiation received and the sensitivity of different tissues and organs. The superficial organs such as thyroid and gonads have a higher sensitivity for radiation in CT scan that are significant enough to be matter of concern. Moreover, beyond certain thresholds, radiation can impair the functioning of tissues or organs and can produce acute hazard for deterministic effect. Objectives: To evaluate the differences among radiation dose received by thyroid gland and gonad for male patient undergoing Brain, Chest, and abdominopelvis CT examination, and to determine if the doses will reach the maximum threshold of deterministic effects. Material and Methods: The current study was conducted in Radiology Department, Philips brilliance MDCT scan has been used in Dr. Sardjito General Hospital. Calibrated RAD-60 dosimeter in May 2016 was used to measure the radiation dose for thyroid gland and gonads. There were 45 patients divided into three groups 15 for brain CT scan, 15 for chest CT scan, and 15 for abdominopelvis CT scan. The data obtained were analyzed using ANOVA and T-test. Results: The differences in radiation dose received by thyroid gland and gonads between three groups (P lt; 0.05). The highest mean of radiation dose received by thyroid gland in brain CT (12#xB1;6 mSv), and the highest mean of radiation dose received by gonads in abdominopelvis CT (8 #xB1;5 mSv). By using T-test one way to compare sample mean with population mean (P lt; 0.05) which means that the radiation dose received by thyroid gland was less than 0.065 Gy, and the radiation dose received by gonads was less than 0.1 Gy because (P lt; 0.05). From this study There were a wide differences between radiation dose received by thy