Radiation Dose Measurement (Ctdivol and Dlp) In Ct Thorax And Abdomen According To Patient’s Body Weight And Gender
Keywords:
Computed Tomography (CT), CTDIvol, Dose Length Product (DLP), NCCT, Radiation Dose.Abstract
Background: Computed Tomography (CT) utilizes differential x-ray absorption by tissues to produce cross-sectional images. Radiation dose in CT is commonly described using Computed Tomography Dose Index (CTDIvol) and Dose Length Product (DLP).This study carried out to evaluate the effect of patient body weight and gender on radiation dose indices (CTDIvol and DLP) in NCCT abdomen and thorax examinations.
Methods: This prospective observational study was conducted in the Radiology Department, Teerthanker Mahaveer Hospital and Research Centre, Moradabad, Uttar Pradesh, India, over one year. A total of 160 adult patients (≥18 years; 100 abdomen and 60 thorax) with body weight 50–75 kg were included. CTDIvol (mGy) and DLP (mGy/cm) values were recorded from routine NCCT abdomen and thorax examinations and analyzed according to body weight (50–60 kg, 61–70 kg, >70 kg) and gender using one-way ANOVA and independent t-test.
Results: In NCCT thorax, mean CTDIvol values were 16.40, 16.28, and 16.29 mGy, and mean DLP values were 732.92, 716.51, and 640.22 mGy/cm across the three weight groups, respectively. In NCCT abdomen, mean CTDIvol values were 16.95, 16.10, and 16.30 mGy, and mean DLP values were 821.87, 852.59, and 815.66 mGy/cm across the weight groups. According to gender, mean CTDIvol and DLP were 16.3 mGy and 696.2 mGy/cm in males, and 16.5 mGy and 759.7 mGy/cm in females for thorax; and 16.2 mGy and 842.9 mGy/cm in males, and 16.9 mGy and 819.7 mGy/cm in females for abdomen. Statistical analysis revealed no significant differences (p > 0.05) in CTDIvol or DLP with respect to weight or gender.
Conclusion: CT radiation doses in NCCT abdomen and thorax examinations among adults (50–75 kg) were not significantly influenced by body weight or gender. Standardized CT protocols provide consistent radiation exposure across patient subgroups, supporting radiation safety and adherence to diagnostic reference levels.
