Choose the content to read

• What is an MRA?
• How does MRA differ from Magnetic Resonance Imaging (MRI)?
• How should I prepare for an MRA?
• What are the risks of an MRA?
• A note from MedPark’s doctors

Magnetic Resonance Angiography (MRA) 

MRA is a non-invasive imaging technique to detect abnormalities in blood vessels and the circulatory system. This advanced method is especially useful in diagnosing vascular diseases such as atherosclerosis or thrombosis. Doctors may use contrast agents to enhance image clarity and diagnostic accuracy in certain patients.

What is an MRA?

MRA harnesses magnetic and radio waves to produce detailed 2D or 3D images of blood vessels and the circulatory system. This technique can identify vascular abnormalities such as stenosis or blockages.

How does MRA differ from Computed Tomographic Angiography (CTA)?

Both MRA and CTA are non-invasive vascular imaging techniques, but they differ in several key aspects:

• CTA: Utilizes computed tomography technology, employing X-rays to generate images. This method is generally faster and always requires a contrast agent, which differs from MRA.
• MRA: Creates images using magnetic and radio waves, avoiding radiation. MRA typically requires a longer scan time, which may be necessary for more detailed imaging.  Contrast material is not always needed. Its use depends on the discretion of the radiologist.

The decision between MRA and CTA depends on the clinical context and the judgments of the radiologist.

How does MRA differ from Magnetic Resonance Imaging (MRI)?

MRI: Utilizes electromagnetic and radio waves to create detailed images of organs and tissues throughout the body. This technique produces high-resolution images, making it beneficial for diagnosing various medical conditions. 

MRA is a specialized MRI technique specifically focused on evaluating the blood vessels and the circulatory system. MRA is particularly effective in diagnosing vascular conditions such as arterial stenosis, aneurysms, or tumors in blood vessels.

When should you undergo an MRA?

Physicians recommend MRA examination to diagnose and plan treatments for various vascular conditions, including:

• Aortic dissection
• Aneurysm
• Vascular thrombosis
• Arteriovenous malformation
• Arterial stenosis
• Atherosclerosis
• Congenital heart disease

How should I prepare for an MRA?

Before the MRA

Make sure to inform your doctor if you:

• Are you pregnant or breastfeeding
• Have a history of drug allergies
• Have chronic conditions such as kidney disease
• Have any implants in your body, such as
  
  • Heart valves
  • Pacemakers or Defibrillators
  • Aneurysm clips
  • Port-A-Cath devices
  • Prosthetic limbs
  • Stents
  • Metallic dental work
  • Tattoos with metal-based ink. In some patients, the radiologists must assess whether these implants or conditions are compatible with MRI and prepare accordingly before the scan.
• MRA is not suitable for patients with cochlear implants
• If you are claustrophobic, inform your doctor so they can prepare a sedative for you.
• Do not wear any jewelry and avoid driving on the day of your appointment, if possible. 

During the MRA (and other MRIs)

You will change into a hospital gown and lie supine on a padded table. The table will then slide into the MRI machine.

During examination:

• It is crucial to remain still during the test to ensure clear and accurate images.
• You may hear intermittent loud sounds from the machine. You will receive earplugs to soften the noise. If you experience discomfort during the exam, you can notify the technologist using the call button at any time.
  In some cases, doctors may inject contrast material to enhance the images. The contrast is administered through an IV line if necessary.

After the MRA

• Image Review: The radiologist will carefully examine the images to identify any abnormalities in the blood vessels, such as areas of arterial narrowing or blockage, which may be due to arteriosclerosis or other vascular conditions.
• Additional Testing: Additional tests may be advisable to investigate other abnormalities if there are clinical suspicions.
• Post-Scan Care: If you experience symptoms after the scan, such as an allergic reaction to the contrast material, promptly seek medical attention. 

What are the risks of an MRA?

An MRA is non-invasive, painless, and generally safe. However, some patients may experience:

• Minor Discomfort: Discomfort during the contrast injection, such as dizziness or a stomach ache.
• Allergic Reactions: Rarely, some patients may have allergic reactions to the contrast.&
• Nephrogenic Systemic Fibrosis (NSF): Patients with severe chronic kidney disease are at increased risk of NSF, a potentially life-threatening condition, from contrast material.

Is an MRA safe?

An MRA test does not use radiation and can often be performed without contrast material, making it a safe diagnostic procedure.

FAQ

• Is contrast material necessary for an MRA test?
  An MRA test does not always require contrast material. However, contrast may be needed to enhance image clarity in some patients for a more accurate diagnosis.
• How long does an MRA test take?
  An MRA test typically takes approximately 20 to 60 minutes, depending on the specific exam protocol and the examined body part.

A note from MedPark’s doctors

An MRA provides detailed images of the blood vessels in the body, allowing doctors to detect abnormalities, diagnose conditions, and plan appropriate treatments. It helps monitor the progress of vascular treatments and assess the risk of stroke and heart disease.