Estimation of Effective Dose of Gonads During Abdominal Scan using Computed Tomography

Abstract

This descriptive, cross sectional study aimed to estimate the effective dose of gonads in abdominal multi-detector helical computed tomography examinations. The problem of the study was that there is no recent local study that estimates effective dose for 3gonads; the most recent one was before four years ago. The study was done in 140 patients (72 males and 68 females) in range of age between 16 to 90 years old, who came for enhanced abdominal multi-detector computed tomography (one to five runs), during the period from April2022 to august 2022, in hospitals and diagnostic centers in Khartoum state include (Omer.Sawi.Medical Hospital, Alfisa.hospital, Doctors hospital, AL Nileien.medical Diagnostic Center and AL Zytoona specialized hospital). The data was collected and analyzed by statistical package for social sciences.The study shows the highest effective dose was in 64 slices scanner (278.0077msv), that because of using inappropriate protocol for abdomen exams. On other hand lower dose (84.2730 msv) in 128 slices scanner. The statistical table showed different manufacture with same number of slice (16 slices) Toshiba was higher dose(248.0443msv) than Canon (138.0829msv) according to independent t test ( p=0.00) which indicate significant difference between manufacture. Comparing with previous studies we found that CTDI volume of our study (43 mGy) was higher than local and international previous studies (5.4 mGy and 35.6 mGy) respectively. Comparing the present study with the national and international organization and diagnostic reference level worldwide; our present study found the DLP(2105.9mGy.cm) was higher than the international studies(1200 mGy.cm) in Germany and Australia and also higher than the study conducted in Sudan (459 mGy.cm)(2010) On the other hand the effective dose of the present study was higher than all national and international studies. The study recommends that appropriate selection of technical parameters that reduce radiation dose without affecting image quality must be take in place.