MR Angiogram

What You Need to Know

Magnetic Resonance Angiogram (MRA) is a powerful and safe diagnostic tool used in hospitals and doctors offices to detect and diagnose issues with blood flow in the body. This non-invasive imaging technique provides detailed images of blood vessels, helping physicians identify and assess various vascular conditions.

How MR Angiogram Works

An MR Angiogram uses a combination of magnetic fields, radio waves, and a computer to create detailed images of blood vessels. Unlike traditional angiograms, MRA does not involve the use of X-rays or ionising radiation. Instead, it relies on the properties of hydrogen atoms in the body to generate images. When exposed to a magnetic field, these atoms align in a way that allows the MRA scanner to capture detailed pictures of blood vessels and blood flow.

Why You Might Need an MR Angiogram

MR Angiograms are used to diagnose and evaluate a range of conditions, including:

Aneurysms: Abnormal bulging of blood vessels.

Arterial Stenosis: Narrowing of arteries.

Blood Clots: Clots that can obstruct blood flow.

Congenital Vascular Malformations: Abnormal blood vessel formations present from birth.

Peripheral Artery Disease: Narrowing of peripheral arteries, typically in the legs.

Venous Thrombosis: Blood clots in veins.

Vascular Tumours: Abnormal growths in blood vessels.

Preparing for an MR Angiogram

Preparation for an MR Angiogram typically includes the following steps:

Medical History: Inform your doctor about any medical conditions, previous surgeries, and any implants or metal devices in your body.

Medication: Continue taking your regular medications unless instructed otherwise by your doctor.

Diet: Follow any dietary restrictions provided by your healthcare provider.

Clothing: Wear loose, comfortable clothing and remove all metal accessories, such as jewellery, watches, and belts.

The MR Angiogram Procedure

Here’s what to expect during the MR Angiogram procedure:

1. Preparation: You will lie on a movable table that slides into the MRA machine.

2. Contrast Dye: In some cases, a contrast dye may be injected through an IV line to enhance the images. Inform your doctor if you have any known allergies to contrast materials.

3. Scanning: The table will move into the scanner, and you will need to remain still. The scanner will create a series of images as it uses magnetic fields and radio waves.

4. Communication: You will be able to communicate with the technician through a microphone. Earplugs or headphones may be provided to help reduce the noise from the machine.

5. Duration: The procedure typically takes 30 to 90 minutes, depending on the complexity of the images needed.

Post-Procedure Care for MR Angiogram

After the MR Angiogram, you can usually resume your normal activities immediately. If contrast dye was used, it is recommended to drink plenty of fluids to help flush it out of your system. Your doctor will review the images and discuss the results with you, outlining any necessary follow-up steps or treatments.

Benefits of MR Angiogram

Non-Invasive: No need for surgery or insertion of catheters.

No Radiation: Uses magnetic fields instead of ionising radiation.

Detailed Images: Provides highly detailed images of blood vessels and blood flow.

Safe: Generally safe with minimal side effects.

Risks of MR Angiogram

While MR Angiograms are generally safe, there are some potential risks and considerations:

Allergic Reactions: Rarely, some patients may have an allergic reaction to the contrast dye.

Implant Interference: Metal implants or devices may interfere with the magnetic field and affect image quality.

Claustrophobia: Some patients may feel uncomfortable in the enclosed space of the MRA machine.

By understanding the MR Angiogram procedure, its benefits, and potential risks, you can be better prepared for the test and informed about its role in diagnosing and managing vascular conditions.