IMPLEMENTASI INDONESIAN DOSE REFERENCE LEVEL (I-DRL) PADA OPTIMASI FAKTOR EKSPOSI MOBILE X-RAY KAPASITAS 100 MA

Abstract

. X-ray imaging technology is widely used in medical diagnosis due to its non-invasive nature and ability to provide detailed anatomical images. Diagnostic radiology is the most common practice utilizing X-ray radiation, and the number of examinations has increased substantially over the years. One of the major advancements in this field is the development of mobile X-ray medical devices. The latest mobile X-ray units have a small current capacity of 30 mA – 200 mA, which reduces their weight and makes them more portable. The exposure factor of a mobile X-ray unit is different from that of a stationary one, with higher voltage and lower current strength being used in mobile X-rays. This study aims to determine the correct exposure factor for a 100 mA capacity mobile Air Kerma (INAK) by using a combination of calculation and measurement results obtained through experimental methods. The INAK equation is obtained through suitability test data and is used to calculate INAK and ESAK doses from existing exposure factors. Dose data and image quality were obtained by exposing the attenuation phantom and TOR CDR phantom. The INAK and ESAK results are compared with the INAK and ESAK values on I-DRL. Exposure factor optimization was not carried out as the INAK and ESAK results calculated and measured from the exposure factor table were by I-DRL. The image quality test was carried out visually using a TOR CDR phantom, and a high contrast value of 20.3%, a low contrast value of 0.9%, and a spatial resolution value of 2.5 lp/mm were obtained. In conclusion, the exposure factors used at the Medilab Pekalongan Clinic are optimal and in line with I-DRL. Keywords: I-DRL, Optimization, image quality, mobile X-ray, Entrance Surface Air Kerma (ESAK), Incident Air Kerma (INAK).