Should you have a cat scan or an angiogram?

Need more info. In what context/disease are you asking about what test to have?
Details. Ct is an noninvasive exam. Angiogram requires needle placement into a blood vessel. Would need to know what is being evaluated and whether a noninvasive exam like a ct would provide all the necessary information. Lots can be gained from noninvasive exams.
Depends on the ? It depends on what the clinical question is.