ANALISIS PAPARAN RADIASI SKYSHINE DINDING RUANGAN ANGIOGRAFI/CATHLAB RUMAH SAKIT MITRA KELUARGA KEMAYORAN BERSUDUT GANTRY 0 DERAJAT

Abstract

Based on NCRP (2005), skyshine radiation generally occurs in radiotherapy facilities, the cause of which is that some radiation facilities are designed with minimal shielding on the linear accelerator (Linac) ceiling. As time goes by, Skyshine radiation monitoring is not only focused on radiotherapy facilities, but radiodiagnostic facilities also need to be monitored, especially interventional radiology, which uses real-time X-ray radiation at certain times. Regarding this matter, it is necessary to check whether the walls of the existing angiography room or cath lab are protected from skyshine radiation. This study aims to determine whether the Angiography/Cathlab room at Mitra Keluarga Kemayoran Hospital does not produce skyshine radiation. The method for measuring skyshine radiation exposure uses a survey meter at a distance of 30 cm and 2 meters 3 times from the outer wall of the Angiography/Cathlab room on the north, south, and west sides of the gantry; then the gantry is positioned at 0 degree. The research results show that radiation exposure is 0.14 µSv/hour at a distance of 30 cm. Skyshine radiation was detected at a distance of 2 meters with an exposure value of 0.32 µSv/hour on the west side of the gantry and 0.39 µSv/hour on the north side of the gantry, this occurred due to the radiation barrier wall (Pb ) not complete until the ceiling is only 2 meters high from the floor. The conclusion is that the walls of the Angiography/Cathlab room at Mitra Keluarga Kemayoran Hospital have exposure to skyshine radiation at a distance of 2 meters measured from the outer walls of the Angiography/Cathlab room on the west and north sides of the gantry of 0.32 µSv/hour and 0.39 µSv/hour. Keywords: angiography/cath lab, radiation, X-ray, skyshine, interventional radiology.