What it is (overview)

An MRI Pelvis Angio with/without contrast (also called a pelvic MR angiogram or MRA pelvis) is a type of diagnostic imaging exam that uses a strong magnet and radio waves to create detailed pictures of the blood vessels and surrounding tissues in the pelvis. Unlike an X-ray or CT scan, MRI does not use ionizing radiation.

The “angio” part means the focus is on arteries and veins—such as the iliac arteries/veins and blood vessels that supply the pelvic organs. The test may be performed without contrast (using specialized MRI techniques to highlight blood flow) or with contrast (using an IV dye, typically gadolinium-based) to make vessels show up more clearly and to better evaluate abnormal tissue.

This test helps your care team look for things like narrowing (stenosis), blockage, blood clots, aneurysms (vessel ballooning), abnormal connections between arteries and veins, and the blood supply to tumors or other pelvic abnormalities. In plain language, the results generally fall into one of these categories:

Normal/negative: Blood vessels and pelvic circulation look typical, with no significant narrowing, blockage, abnormal vessel structures, or suspicious blood-flow patterns.

Abnormal/positive: The MRI may show reduced blood flow, a clot, narrowed or enlarged vessels, or unusual vessel patterns that can be linked to vascular diseases, inflammation, injury, or growths affecting the pelvic organs (for example, uterus, ovaries, prostate, bladder, and surrounding tissues). Your clinician uses these findings—together with your symptoms and other tests—to guide next steps such as medication, follow-up imaging, or a procedure.

When & why it's usually done

Doctors most often order an MRI pelvis angiogram when they need a highly detailed view of pelvic blood vessels or want to clarify findings from an ultrasound, CT, or prior MRI. It may be recommended if you have symptoms that suggest a blood-flow problem or when planning treatment where knowing the vessel anatomy is important.

Common reasons include:

Symptoms that may point to a vascular problem in the pelvis such as pelvic pain (especially if unexplained or persistent), leg pain with walking or exertion related to reduced blood flow, swelling, heaviness or visible pelvic/leg veins, or symptoms suggesting a blood clot.

Evaluation of suspected or known vascular diseases including narrowing or blockage of pelvic arteries/veins, aneurysm, dissection, or abnormal vessel structures.

Assessment of masses and tumors when a provider needs to understand blood supply to a tumor or distinguish vascular from non-vascular causes of a pelvic mass. It can help with planning surgery, embolization, or other targeted treatments.

Pelvic organ and reproductive health concerns such as evaluating blood flow issues related to uterine fibroids, pelvic congestion/varicose veins, or complications after procedures.

Pre-procedure planning and follow-up before or after interventions (for example, stents, bypass, embolization, or treatment of vascular malformations) to map vessel anatomy and check outcomes.

With vs. without contrast: Contrast may be used when the radiologist needs the clearest possible view of small vessels or complex anatomy, or to better characterize a lesion. Non-contrast MRA may be chosen when contrast is not advisable (for example, certain kidney problems or prior contrast reactions), depending on the clinical question.

Common diseases related to it

• Peripheral arterial disease (PAD) involving the iliac or pelvic arteries (narrowing/stenosis)
• Arterial or venous thrombosis (blood clot), including iliac vein thrombosis
• Pelvic venous insufficiency / pelvic congestion syndrome (pelvic varicose veins)
• Aneurysm or pseudoaneurysm of pelvic arteries
• Arteriovenous malformation (AVM) or arteriovenous fistula (abnormal artery-to-vein connection)
• Deep vein thrombosis (DVT) extension into pelvic veins
• May-Thurner syndrome (iliac vein compression)
• Vasculitis affecting pelvic blood vessels (inflammation of vessels)
• Tumors or masses where vascular mapping is needed (e.g., uterine fibroids, gynecologic or urologic tumors)
• Post-surgical or post-procedural vascular complications (bleeding, vessel injury, abnormal flow)

Health goals where it may help

• Identifying and monitoring pelvic vascular health (arteries and veins) to reduce complications from vascular disease
• Clarifying the cause of chronic pelvic pain by evaluating blood flow and pelvic varicosities
• Supporting treatment planning for tumors or pelvic masses by mapping blood supply and vessel anatomy
• Guiding minimally invasive treatments (such as embolization) and assessing results after treatment
• Evaluating circulation-related causes of leg swelling or suspected clot burden extending into pelvic veins
• Reducing unnecessary procedures by providing detailed, non-radiation diagnostic imaging of the pelvis