What's the difference between CT scan Why does CT require a prep but a CAT scan doesn't?

A CT scan and a CAT scan refer to the same imaging technique; "CAT" stands for "Computed Axial Tomography." The difference in preparation often arises from the specific area being scanned or the type of contrast material used. For certain CT scans, especially those involving the abdomen or pelvis, patients may need to fast or undergo specific prep to enhance image clarity, whereas other scans might not require such preparations. Always follow your healthcare provider's instructions for the specific scan you are undergoing.