Protection of Radiation Dose Colon in Loop Fluoroscopy with Suspicion of Megakolon Disease at Radiology Unit of Bunda Thamrin Hospital Medan

Abstract

A research had been done about radiation doses on Colon In Loop diagnostic with suspected megakolon disease using fluoroscopic X-ray. The radiation should be on the radiation field directly opposite to assist the patient during Colon In Loop diagnostic. The scattering radiation from fluoroscopic X-ray might affect to the radiation worker or the patient's assistant it used X-rays. The measurement of scattered radiation at distance of 0 cm, 10 cm, 20 cm, 30 cm and 50 cm with the appropriate voltage variation required for the inspection of fluoroscopy colon in loop ie 80 kVp with 8 mAs and 70 kVp with 8 mAs aimed to determined the distance of the radiation worker's secure points. The measurement was done by Thermoluminisence Dose. Radiation dose received and increased at 0 cm for exposure factor at 80 kVp with 8 mAs of radiation dose 64.983 mSv and 92,24% and exposure factor at 70 kVp with 8 mAs radiation dose 41,955 mSv and 92,77%. The received radiation dose was smaller at 50 cm for exposure factor at 80 kVp with 8 mAs radiation dose of 0.100 mSv with a percentage were 0.14%, exposure factor at 70 kVp with 8 mAs radiation dose of 0.013 mSv or 0.03%. The results showed that the radiation dose would be smaller when the distance of radiation source increased. Then, from this researched confirmed that 50 cm was a secure point when did the inspection of fluoroscopy colon in loop.