“What is the difference between an MRI and CT?”
I need to have a CT scan of my spine, but I'm wondering why my doctor didn't call for an MRI instead. What is the difference between an MRI and a CT scan? And why would he choose one over the other?
5 Answers
MRI is far superior for imaging the spine.
Two entirely different ways to look at the same area. The MRI uses magnets and takes a long time in an enclosed space, so if you have a pacemaker it won't be the best for you unless you have one that is MRI compatible. Also, if you are claustrophobic, can significantly impact the test. The CT uses radiation and is best to look for subtle fractures. Best thing to do is simply ask your doctor...sure he has good reasons! Best of luck!
MRI is more informative provided you (the patient) have no contradictions to having MRI studies.
CT visualizes the bone structures better, MRI better visualizes the soft tissue. No radiation with MRI. Depending on what he is looking for he may have a preference for the CT. I would ask your doctor.
MRI is good for soft tissues and CT is good for bones. MRI takes longer, so anything that moves, like the heart and bowels, is better seen with CT.
