Evaluation of Patient's Received Dose in Abdomen/Pelvis CT Examinations: A Case Study in Lahijan Hospital, Iran

Abstract

Purpose: Computed Tomography (CT) is a widely used medical imaging technique that employs continuous X-ray radiation. However, compared to other imaging modalities, CT scanning delivers relatively high radiation doses, potentially causing tissue damage and increasing cancer risk. This study aims to assess the radiation dose received by patients during abdominal-pelvic CT examinations, compare it with existing studies, and propose methods to minimize patient dose, thereby reducing associated cancer risks.

Materials and Methods: This study evaluated radiation doses to the liver, stomach, bladder, left kidney, and right kidney in six patients scanned with a Siemens CT scanner. Dosimetry was performed using TLD-GR200 thermoluminescent dosimeters.

Results: Results show that the bladder received the highest average dose, followed by the stomach, liver, left kidney, and right kidney, in that order. Notably, the mean dose to the stomach exceeded that of the bladder, indicating a heightened risk to the stomach. The organ doses measured in this study were consistent with values reported in prior studies and within the Diagnostic Reference Levels (DRLs) recommended by the International Commission on Radiological Protection (ICRP). However, given the stochastic nature of radiation risks, which lack a threshold and can manifest even at doses below 10 mSv, continued efforts to optimize patient dose are imperative.

Conclusion: This study highlights that the bladder receives the highest radiation dose, while the kidneys receive the lowest. The observed organ doses align with ICRP recommendations and prior research. Nonetheless, minimizing radiation exposure remains critical to enhance patient safety without compromising diagnostic efficacy.