MR Angiography Renal (MRA)

The MR Angiography Renal (MRA) is a noninvasive imaging test used to visualize the blood vessels in and around the kidneys. It uses a powerful magnetic field, radio waves, and a contrast agent (usually gadolinium) to create detailed images of the renal arteries and veins. This test helps detect conditions such as narrowing (stenosis), blockages, aneurysms, or other abnormalities in the blood vessels that supply the kidneys.

Doctors may recommend a renal MRA if you have high blood pressure that may be related to kidney artery problems, reduced kidney function, or signs of vascular diseases affecting the kidneys. It is also useful in evaluating kidney transplant blood supply or in planning surgeries.

Since MRA does not use radiation, it is generally considered safer than other imaging tests like CT angiography. However, patients with kidney problems, metal implants, or allergies to contrast agents should inform their doctor beforehand. The procedure is usually painless and requires you to lie still inside an MRI scanner while the images are taken.