Reasons you may not be able to
have the test or why the results may not be helpful include:
Pregnancy. An MRI test usually is not done
during pregnancy. In some cases, an MRI could be safely done late in your
pregnancy if your doctor wants to check your belly or your developing baby for
Medical devices that use electronics, such as a pacemaker
or medicine infusion pump. The MRI magnet may cause problems with these
Medical devices that contain metal, which can make some of
the detailed MRI pictures blurry. This may prevent your doctor from seeing the
organ that is being looked at. For example, an
intrauterine device (IUD) that contains metal may
prevent your doctor from seeing the uterus clearly.
If you are not
able to remain still during the test.
Obesity. A person who is very overweight may not fit
into standard MRI machines.
What To Think About
Sometimes your MRI test
results may be different than those from CT, ultrasound, or X-ray tests because
the MRI scan is more specific.
An abdominal CT scan or
abdominal ultrasound is generally done before an MRI
of the abdomen. Another test that may be done before or after an MRI of the
abdomen is called endoscopic retrograde cholangiopancreatography (ERCP).
Open MRI machines are now made so that the magnet does not
completely surround you. Open MRI is useful for people who are claustrophobic
or obese. But these machines are not available everywhere. Also, these machines
may not be able to do all the studies needed to check for