What it is (overview)

An MR Abdomen Angio with/without contrast (also called MRA of the abdomen or abdominal angiography MRI) is a non-invasive diagnostic imaging test that uses a strong magnetic field and radio waves to create detailed pictures of the blood vessels and abdominal organs. It is designed to evaluate blood flow and the structure of arteries and veins in the abdomen, such as the aorta, renal (kidney) arteries, mesenteric (intestinal) arteries, and vessels supplying the liver and other organs.

This exam may be done without contrast (using special MRI techniques to visualize blood flow) or with contrast imaging using an IV dye called gadolinium. Contrast often makes the blood vessels stand out more clearly, helping radiologists see narrowing, bulges, clots, or abnormal connections between vessels.

What it “measures” and what results mean: the test does not measure a single number like a blood test. Instead, it provides images that are interpreted for problems such as:

Normal/negative findings generally mean the major abdominal vessels look open (patent), blood flow appears normal, and there is no clear evidence of a blockage, aneurysm, dissection, or abnormal vascular growth.

Abnormal findings may show narrowing (stenosis) that can reduce blood flow, a blockage (occlusion) from plaque or clot, a bulge (aneurysm), a tear in the vessel wall (dissection), or unusual vessel patterns that can be associated with tumor detection or vascular malformations. Your report will typically describe which vessel is involved, how severe the problem appears, and whether follow-up tests or treatment (medication, stenting, surgery, or monitoring) may be needed.

When & why it's usually done

Doctors commonly order an MRI abdominal angiography when they need a detailed vascular assessment of the abdomen or when symptoms suggest reduced blood flow to abdominal organs. It may also be used to plan procedures (such as surgery or stenting) or to monitor known blood vessel conditions over time.

This test is often considered when a person has symptoms or clinical concerns such as:

Abdominal pain that raises concern for blood-flow problems, especially pain after eating, unexplained weight loss, or symptoms that suggest reduced blood supply to the intestines (possible mesenteric ischemia).

Hard-to-control high blood pressure or worsening kidney function, which can be linked to renal artery stenosis (narrowing of the kidney arteries).

A suspected or known abdominal aortic aneurysm or other aortic disease, particularly when detailed mapping of vessel anatomy is needed.

Evaluation of a mass or suspected tumor in abdominal organs (such as the liver, kidneys, pancreas, or adrenal glands), because tumors may have characteristic blood supply patterns and nearby vessels may be involved or displaced.

Abnormal findings on other tests (for example, ultrasound, CT, or routine MRI) that require a closer look at blood vessels, including possible blockages, clots, or abnormal growths.

Pre-operative planning and follow-up for vascular surgery, transplant evaluation (especially kidney or liver), or after stent placement or repair, depending on the clinical situation.

“With or without contrast” is chosen based on the clinical question and patient-specific factors. In some cases (for example, certain kidney problems, history of contrast reaction, or pregnancy), a non-contrast MRA technique may be preferred. Your imaging team will select the safest and most informative approach.

Common diseases related to it

• Abdominal aortic aneurysm (AAA)
• Aortic dissection or other aortic pathology
• Renal artery stenosis (including atherosclerotic disease)
• Fibromuscular dysplasia affecting renal or other abdominal arteries
• Mesenteric ischemia (chronic or acute reduced intestinal blood flow)
• Peripheral arterial disease involving abdominal or iliac vessels
• Portal vein thrombosis or other abdominal venous thrombosis (in selected protocols)
• Vascular malformations and arteriovenous malformations (AVMs)
• Vasculitis (inflammation of blood vessels, such as polyarteritis nodosa)
• Tumors with vascular involvement (e.g., renal cell carcinoma, hepatocellular carcinoma) and assessment of tumor blood supply

Health goals where it may help

• Identifying the cause of abdominal pain when reduced blood flow or vascular disease is suspected
• Monitoring cardiovascular and vascular health, including screening and follow-up of aneurysms or arterial narrowing
• Protecting kidney health by evaluating renal blood flow in suspected renal artery disease
• Guiding treatment decisions (medications, angioplasty/stenting, surgery) by mapping vessel anatomy and severity of blockage
• Tumor evaluation and treatment planning by assessing blood supply to a mass and involvement of nearby vessels
• Post-treatment surveillance after vascular repair, stent placement, or other interventions (when appropriate for MRI/MRA)
• Reducing exposure to ionizing radiation compared with some other angiography methods, when MRI is an appropriate option