MRI vs MRA

MRI vs MRA | What’s the Difference?

In today’s post we discuss the difference between two diagnostic imaging studies – MRI vs MRA. Magnetic Resonance Imaging (MRI) and Magnetic Resonance Angiography (MRA) are both powerful diagnostic tools that use magnetic fields and radio waves to create detailed images of the body. While they share a similar foundation, each serves distinct purposes in medical imaging.

What is MRI?

MRI is a non-invasive imaging technique that provides high-resolution images of the body’s soft tissues, such as muscles, fat, organs, and the brain. Unlike X-rays or CT scans, MRI does not use ionizing radiation, making it a preferred option for many patients and healthcare providers. It is commonly used to evaluate conditions such as torn ligaments, tumors, and abnormalities of the brain and spinal cord.

Capitol Imaging Services offers a wide range of MRI systems to meet the diverse needs of medical providers. These include 3T ultra-high field, 1.5T high field, and 1.2T high field open MRI units, in addition to other open scanner options. These systems support specialists in orthopedics, neurology, urology, pain management, and gastroenterology.

What is MRA?

MRA, or Magnetic Resonance Angiography, is a specialized type of MRI specifically designed to image blood vessels, including arteries and veins. It enables radiologists to assess both healthy and diseased vessels and to observe blood flow in areas such as the brain and neck.

MRA can be used to evaluate most major arteries in the body. It is frequently used to examine the carotid arteries and cerebral vessels, providing insight into their shape, size, and orientation. With this information, radiologists can diagnose vascular conditions and determine appropriate treatments.

MRA is particularly valuable in detecting:

  • Atherosclerosis: The hardening or narrowing of arteries due to fat deposits. Blockages in these arteries can lead to a transient ischemic attack (TIA) or stroke.
  • Brain Aneurysms: Abnormal ballooning or widening of cerebral vessels, which can rupture and cause life-threatening bleeding.
  • Vascular Malformations: Congenital abnormalities where blood or lymph vessels are tangled or malformed, potentially leading to hemorrhage or neurological issues.
  • Certain Types of Headaches: MRA may also be recommended for patients experiencing specific headache patterns linked to vascular issues.

Key Differences Between MRI and MRA

  • Purpose: MRI is used to assess soft tissues and organs, while MRA focuses on the vascular system.
  • Contrast Usage: MRA typically requires intravenous contrast to enhance visibility of blood vessels. MRI may or may not involve contrast, depending on the diagnostic objective.
  • Clinical Applications: MRI is broadly used across medical disciplines. MRA is more targeted, especially useful in cardiology, neurology, and vascular diagnostics.

What to Expect During an MRI or MRA Exam

Both MRI and MRA exams are painless and non-invasive. Prior to the exam, patients are screened for safety, particularly regarding any implants, stents, or pacemakers that may be incompatible with MRI equipment.

During the scan:

  • Patients lie still in a well-lit, air-conditioned scanner.
  • Loud tapping or thumping sounds are common. Earplugs or headphones are provided, and music may be available to help with relaxation.
  • Patients may be asked to hold their breath for short periods during imaging sequences.
  • The area being scanned may feel slightly warm.

If intravenous contrast is needed (especially in MRA studies), patients may experience a brief cool sensation and minor discomfort from the IV placement. Some bruising or mild irritation at the injection site is possible.

Most MRI exams take 30 to 60 minutes. MRA exams typically last between 45 and 60 minutes.

Conclusion

While MRI and MRA use similar technology, they serve different diagnostic purposes. MRI offers comprehensive imaging of soft tissues, while MRA provides critical insights into vascular health. Your healthcare provider will determine which study is appropriate based on your symptoms and medical history.

We’re Here When You Need Us

Capitol Imaging Services is committed to delivering high-quality, patient-centered care through advanced diagnostic imaging. Our state-of-the-art MRI and MRA technology, experienced staff, and broad network of locations across the Gulf South ensure you receive accurate, efficient imaging tailored to your needs.

Click here to find the CIS location near you. From soft tissue scans to vascular evaluations, we’re here to support your health with clarity and confidence—trusted by doctors, preferred by patients.