How do I prepare for the test?
- Tell your doctor if you have a pacemaker, artificial hip, or
any metal pins, plates, screws, or surgical staples. The magnet
used in an MRI is so strong that it can interfere with pacemakers
and pull on some metal objects implanted in the body. If you
know you have an implant, or are concerned, discuss the issue
with your doctor, as other options may exist. (Some pacemakers,
for example, can be reprogrammed prior to an MRI so that they
are not disrupted.)
An IV is inserted into a vein if the particular scan you're having
requires a dye to make areas of inflammation or abnormality easier
to detect. This dye is called gadolinium, and is different from
the contrast dye used for x-rays or CT scans. Before undergoing
the scan, remove metal objects such as belt buckles or watches,
which could dislodge in the presence of the magnet and hurt you.