MRI Scans: A Powerful Diagnostic Tool for Foot and Ankle Conditions

While physical exams and X-rays are effective for diagnosing many foot and ankle issues, some conditions require a more detailed look. In these cases, magnetic resonance imaging (MRI) can be an essential tool for identifying the cause of pain, swelling, or discomfort in your feet, ankles, or lower legs.

Unlike X-rays or CT scans, MRIs do not use radiation, making them a safer option for patients who need to avoid exposure to radiation. Additionally, MRIs provide superior imaging of soft tissues, which are often difficult to assess through traditional imaging methods.

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When Is an MRI Needed?

In podiatric care, MRIs are frequently used to non-invasively evaluate deeper structures in the feet and ankles. Your doctor may recommend an MRI to help diagnose:

  • Arthritis or joint damage
  • Bone injuries, including fractures
  • Cartilage damage
  • Infections
  • Ligament injuries, such as sprains or tears
  • Soft tissue tumors
  • Tendon injuries, including Achilles tendon tears

How MRI Works

MRI scans use a combination of strong magnetic fields and radio waves to create detailed images of both soft tissues and bones. During the scan, the affected foot or leg is placed inside the MRI machine. The process is painless and non-invasive, and most patients do not experience any discomfort during the exam.

Once the scan is complete, your doctor will review the images to assess for any abnormalities and determine the best course of treatment.

MRI Safety and Restrictions

Because MRIs rely on magnetic fields, certain medical devices or implants may interfere with the scan or pose safety risks. You may not be eligible for an MRI if you have:

  • Artificial heart valves
  • Metal prosthetic limbs or implants
  • Brain aneurysm clips
  • Pacemakers or defibrillators
  • Cochlear (inner ear) implants
  • Implanted metal-containing devices (e.g., IUDs)
  • Nerve stimulators (e.g., TENS units)
  • Implanted medication pumps (e.g., for insulin or pain medication)

Even if you have one of these devices, it doesn’t automatically rule out an MRI. It’s essential to inform your doctor about any implants or medical devices before the scan so they can take appropriate precautions.

If you’re experiencing ongoing pain or swelling that hasn’t improved with initial treatments, talk to your podiatrist about whether an MRI might be the next step in your care.