Name of the Procedure:

Magnetic Resonance Angiography (MRA) without Contrast, Lower Extremity
Common Name(s): MRA Scan
Medical Term: Magnetic Resonance Angiography (CPT C8913)

Summary

Magnetic Resonance Angiography (MRA) of the lower extremity is a non-invasive imaging test that uses a magnetic field and radio waves to create detailed images of the blood vessels in the legs. Unlike traditional angiography, this procedure does not require the use of contrast dye, making it suitable for individuals with kidney issues or allergies to contrast material.

Purpose

• Medical Conditions: Used to diagnose blockages, abnormalities, or other vascular conditions affecting the arteries and veins in the lower extremities.
• Goals: To provide clear images of blood vessels, helping doctors detect issues such as blockages, aneurysms, or vascular malformations.

Indications

• Symptoms like chronic leg pain, swelling, or numbness.
• Diagnosing peripheral artery disease (PAD).
• Pre-surgical planning for vascular interventions.
• Follow-up assessment of previously diagnosed vascular conditions.

Preparation

• Instructions: No specific preparation such as fasting is usually required. Patients should wear loose, comfortable clothing and may be asked to remove any metal objects.
• Pre-Procedure Tests: Often, no additional diagnostic tests are needed; however, a general health assessment may be performed.

Procedure Description

1. Step-By-Step:
   • Patient lies on a padded table that slides into the MRI machine.
   • The machine creates a strong magnetic field around the lower extremities.
   • Radio waves are used to produce detailed images of blood vessels in the legs.
2. Tools/Equipment: MRI scanner with angiography capabilities.
3. Anesthesia/Sedation: Generally, no anesthesia or sedation is needed.

Duration

Typically, the MRA procedure takes about 30 to 60 minutes.

Setting

Performed in the radiology or imaging department of a hospital or an outpatient imaging center.

Personnel

• Radiologic Technologist to operate the MRI machine.
• Radiologist to interpret the images and provide a diagnosis.

Risks and Complications

• Common Risks: There are minimal risks, as no radiation is used and there is no need for contrast dye.
• Rare Risks: Claustrophobia or discomfort from lying still; possible allergic reaction to metal in the MRI environment.

Benefits

• Expected Benefits: Non-invasive, detailed imaging of blood vessels without the risks associated with contrast dyes.
• Time to Realization: Images are typically available immediately for radiologist review.

Recovery

• Post-Procedure Care: No specific care required; patients can usually resume normal activities immediately.
• Recovery Time: Immediate.
• Follow-Up: Any necessary follow-up will depend on the findings of the MRA.

Alternatives

• Other Options:
  • Traditional angiography with contrast dye.
  • Computerized Tomography Angiography (CTA).
• Pros/Cons:
  • MRA without contrast avoids allergic reactions and kidney toxicity risks compared to contrast-based methods.
  • Traditional methods may provide more detailed images in some cases but come with higher risks.

Patient Experience

• During the Procedure: Patients may hear loud tapping or thumping noises from the MRI machine but should not feel any discomfort.
• After the Procedure: Immediately return to normal activities; minimal to no pain management required.

By providing detailed images safely and effectively, MRA serves as a valuable diagnostic tool in assessing vascular health in the lower extremities.