ANALISIS KORELASI ANTARA NILAI DEVIATION INDEX DAN ENTRANCE SURFACE AIR KERMA (ESAK) DALAM UPAYA OPTIMISASI DOSIS RADIASI PASIEN DI MANDAYA ROYAL HOSPITAL PURI

Abstract

Chest radiograph examination is the most common diagnostic radiology procedure. Therefore, optimization is required regarding chest examination, both in terms of image quality and the radiation dose received by the patient. This study discusses the relationship between the deviation index and the patient's radiation dose produced. The deviation index is a parameter that can determine whether the resulting image is underexposed or overexposed. This study's varied parameter is the exposure index target (EI_T). The study observed 100 patients, with 50 patients having an EI_T of 400 and 50 having an EI_T of 250. Based on the research findings, varying the EI_T parameter resulted in an average deviation index value of 1.86 ± 0.16 (for EI_T 400) and 2.18 ± 0.133 (for EI_T 250).Meanwhile, the Entrance Surface Air Kerma (ESAK) value calculation was done manually as the Si-INTAN account is currently undergoing maintenance. The resulting ESAK values from the study were 0.318 mGy ± 0.027 (for EI_T 400) and 0.296 mGy ± 0.020 (for EI_T 250). Based on the research findings, it can be concluded that the deviation index value remains an effective tool for measuring the quality of images produced during the optimization process of patient radiation dose. Keywords: exposure index, deviation index, ESAK, DRL, Si-INTAN