Evaluation of Radiation Risks in Computed Tomography in Sudan

Abstract

The purpose of this study was to evaluate the patient radiation dose in three different modalities of CT scanners (64 slices, 16 slices and 2 slices for routine CT investigations. A total of 108 patients were examined in this study in three different hospitals in Khartoum state. The data was collected from the following examinations: brain, chest, abdomen and pelvis. The mean dose values for CT brain for 16 slices was 670±380 mGy.cm, the average dose value for 2 slices was 331.1±161mGy.cm, while the average dose for was 1160.8±435.7 mGy.cm. For CT abdomen the averaged dose value in hospital B was 270.6±100 mGy.cm, the average dose value in hospital C was 164±56 mGy.cm, while in hospital A the average dose values was 1444±954 mGy.cm. For CT chest the averaged dose values in the hospital B was 209.6±83.3mGy.cm, the average dose values were in hospital C was 238.8±116.2mGy.cm, while the average dose value in hospital A was 1121.2±872 mGy.cm. Dual slice scanner delivered the least radiation dose while 16 and 64 slice scanners delivered the highest radiation dose. The dose values of this study were comparable to the international reference levels CT examination. CT dose optimisation protocol is not implemented in all hospitals.