The Optimal Scan Delay of Contrast Media Injection for Diagnosing Abdominal Tumors (Image Quality and Radiation Dose Aspects of Abdominal CT Scan)

Abdominal tumors due to malignancy in the liver often occurred in Abdomen CT Scan patients. To obtain a good and accurate image quality can be done by setting the scan delay and improper timing of contrast media injection. It will have an impact on the image of the tumor and also the patient dose. The purpose of this study is to determine the values of scan delay that also fulfilled the radiation protection aspects. The research was done by using 40 image samples resulted from 5 scan delay (60, 65, 70, 75, 80 s). Assessment was determined by calculated the Region of Interest (ROI) of object and dose which analyzed by Friedman tests. There was a difference in image quality. The results of dose calculations showed an increase in dose for each additional scan delay. Suggest for getting the optimal image quality with 70 s scan delay and the maximum scan delay with 75 s is still accepted for patients. The radiation dose is 24.54 mGy with maximum scan delay, which under the regulation of Bapeten and safe for the patients. The results of this study can give the recommendation for scan delay setting in abdominal CT scan to diagnose the abdominal tumor.