An abdominal CT scan for a clinically suspected abdominal mass is usually done:

Question

Quizplus · Accepted Answer

Opacification of the GI tract and vascular and parenchymal enhancement make abdominal CT a far better exam than without oral and IV contrast agents. Some institutions may still use the protocol of oral contrast material without and with IV contrast enhancement, but except in situations where there is a specific indication for unenhanced scanning (such as suspected renal calcifications or hepatic steatosis), it is not necessary to routinely expose patients to a double dose of ionizing radiation.

An Abdominal CT Scan for a Clinically Suspected Abdominal Mass