Estimation of Radiation Dose during Chest Computed Tomography Examinations

Abstract

Radiation exposure associated with multislice CT has increased substantially over the past two decades and is a major concern that needs to quantify the patient doses during Ct procedures. The aim of this study was to evaluate the radiation doses from Chest Computed Tomography Examinations. The data used in this study was collected from Modern Medical Center MMCKhartoum the data collected from November 2017 to January 2018. A total of 66 patients were examined in CT department with GE machine (Optima) 16 slice. The amount of radiation dose a patient receives from a CT scan depends upon two key factors; the CTDIvol and the DLP. The result of the study revealed that the values we obtained from CT Chest with contrast exam was CTDIvol 8.69±3.620 mGy, DLP 702.54±344.37 mGy/cm and Effective Dose (ED) was 9.84±4.82 mGy, from HRCT study; CTDIvol was 12.48±3.732 mGy, DLP 387.92±121.48 mGy/cm and ED 5.43±1.70 mGy and from Pulmonary angiography procedure was CTDIvol 13.53±3.20 mGy, DLP 986.73±276.12 mGy/cm and ED 13.81±3.86 mGy Selection of the most appropriate imaging modality should be performed in view of the delivered doses, required image quality and information and the clinical circumstances.