Renal Magnetic Resonance Angiography or MRA is a test that allows accurate evaluation of patients suspected to have renal artery stenosis and other kidney related diseases without the risks associated with nephrotoxic contrast agents, ionizing radiation, or arterial catheterization.
What is MR Angiography Renal?
Renal MRA is a non-invasive exam that uses powerful magnets and radio waves to create images of the renal arteries in patients with abdominal aortic aneurysms or allergies to iodinated contrast media, or when other noninvasive screening examinations have been inconclusive.
It is also used to
- Map the vascular anatomy for planning renal revascularization.
- Planning repair of abdominal aortic aneurysms.
- Assessing renal bypass grafts and renal transplant anastomoses.
- Evaluating vascular involvement by renal tumors.
How is MR Angiography Renal performed?
A contrast dye is injected into the hand or forearm of the patient to help improve the quality of the images. The patient lies flat on the table, which then slides through a doughnut-shaped chamber. Inside the chamber, the magnetic fields and radio waves surround the body and create the images. The painless procedure may last anywhere from 30 to 90 minutes.
Side effects/risks of MR Angiography Renal
MRAs are extremely safe and can be performed repeatedly. The only complications that might arise are those related to an allergic reaction to the dye and sedatives if given.
Preparation before performing MR Angiography Renal
The doctor needs to be Informed about any prior medical conditions, allergies and asthma. You will be
- asked to remove any metal objects
- given a mild sedative to help you relax if you are claustrophobic.
Post-care after MR Angiography Renal
In case you were given a sedative,
- do not drive or take public transport.
- Have someone with you for 24 hours afterward.
- Do not operate machinery on the day of the scan.
Download the mfine app and consult radiologists online.