Dose Comparison of Obese and Non-Obese During CT Abdomen Scan

Computed tomography (CT) of the abdomen is an essential diagnostic modality but contributes significantly to patient radiation exposure, particularly in obese individuals. This prospective comparative study evaluated the relationship between body mass index (BMI), cross-sectional diameters, and radiation dose parameters during CT abdomen examinations. Eighty patients aged 15–85 years underwent non-contrast CT abdomen scans using a 16-slice multidetector CT scanner. Patient age, height, weight, BMI, anteroposterior (AP) and lateral diameters were recorded, and radiation dose indices including CT dose index (CTDIvol) and dose length product (DLP) were analyzed. Results demonstrated a strong positive correlation between BMI and radiation dose, with obese patients receiving significantly higher CTDI and DLP values compared to non-obese patients. AP diameter showed a stronger association with radiation dose than lateral diameter. The study highlights that patient size, particularly BMI and AP diameter, is a key determinant of radiation exposure in CT abdomen scans. Incorporating these parameters into dose optimization strategies may help reduce radiation risk while maintaining diagnostic image quality.