|Indications for use and specialized MRI techniques|
MAGNETIC RESONANCE ANGIOGRAPHY (MRA)
This specialized technique takes advantage of the flow properties of blood vessels to obtain images.
MRA is commonly used to evaluate arterial blood flow to the central nervous system. It is also used to evaluate arterial blood flow to the extremities, abdominal organs and the intestines.
MRA displays the caliber of a blood vessel, allowing evaluation for occlusions, stenosis or aneurysms, for congenital abnormalities, and for the presence of blood clots or atherosclerosis.
The image on the right is an MRA of the arch of the aorta, the subclavian arteries and arteries of the neck. Note the arteries appear bright, while the background tissues are dark and not well seen with this specialized angiographic technique.