What are the indications and contraindications of a three phase ct scan?

A three-phase CT scan is typically indicated for evaluating tumors, assessing vascular conditions, and detecting certain types of infections or inflammatory processes due to its ability to provide detailed images of blood flow and tissue perfusion. Contraindications include a history of severe allergic reactions to contrast agents, renal impairment or failure (due to the risk of contrast-induced nephropathy), and pregnancy, as the radiation exposure may pose risks to the developing fetus. Additionally, patients with certain conditions, such as hyperthyroidism, may also be contraindicated due to the iodine-based contrast used.