Using a contrast agent to make organs and tissues more visible on the scan also bumps the price. Typically, an MRI is more costly than a CT scan, but prices vary widely from different providers ...

But in those cases, you usually need an MRI, not an X-ray or CT scan. Some red flags include ... to avoid having a tube inserted into the colon. But it requires the same pretest prep, and abnormal ...

For many situations, MRI is the preferred diagnostic tool -- especially for brain imaging, although CT scan is still chosen for strokes because it is better at detecting hemorrhage. The drawback ...

That's changing with the advent of new imaging technology: CT scans ... defibrillator. The contrast medium is not iodine-based, so there are no allergy problems. The MRI scan requires that ...