ANALISIS PENAHAN RADIASI RUANGAN RADIOLOGI INTERVENSI CATHLAB SEBAGAI UPAYA PROTEKSI KESELAMATAN RADIASI DI RSUP. H. ADAM MALIK MEDAN

The exposure value received does not exceed the dose limit value (NBD) set by the regulation of the Nuclear Energy Supervisory Agency (BAPETEN) recommended by the National Council on Radiation Protection and Measurement (NCRP). This is the goal of radiation protection in achieving radiation safety for workers, patients and the public. To achieve this, it is necessary to evaluate the radiation-retaining structural walls of the interventional radiology room, X-ray fluoroscopy angiography, GE and Philips brands, Cathlab 1 and 2, respectively, at Adam Malik Hospital by comparing the data obtained from field calculations with the recommendations of regulators or theoretical. The results obtained are the thickness of the radiation retaining walls of the GE and Philips rooms by calculating the transmission factor and the thickness of the secondary radiation shield for each wall of the GE and Philips Cathlab rooms with a secondary air kerma value of 1 meter 3.8, the largest Xbarrier is 120.2 mm concrete, respectively. and 1.75mmPb and 81.13mmconcrete and 0.12mmPb. Using real calculations, the secondary air kerma value is 0.003 for the GE room, it is obtained that the concrete Xbarrier and Pb are minus values and the Philips air kerma value is 0.189, the Xbarrier is 22.1mm of concrete and 0.24mmPb. Meanwhile, the currently installed wall thickness is 28 cm of concrete and 0.5mmPb, with a total of 25 patients per week. On the other hand, exposure to environmental radiation, leakage of X-ray aircraft is also within safe limits. The conclusion is that the shield retaining installed both concrete and Pb on each wall of the X-ray inspection room of Cathlab 1 GE and Cathlab 2 Philips, Adam Malik General Hospital is in a safe condition for intervention, and radiation exposure measured in the environment as well as leakage of the light aircraft. -X is also within safe limits, so that the purpose of radiation shielding can be achieved, namely radiation exposure received by both officers, patients and the public does not exceed the specified dose limit value. Keywords: Radiation safety, dose limit value, radiation barrier, interventional radiology.