Updated November 7, 2026 · By the MRIScanNearMe.com Team
Quick answer: A knee MRI shows the soft tissues an X-ray can't, including the meniscus, cartilage, ligaments and tendons, along with bone injuries and signs of arthritis. According to MedlinePlus, the test most often lasts 30 to 60 minutes, but may take longer. It is painless and uses no radiation. For long-lasting knee pain, X-rays usually come first.
If your knee keeps aching, locks up or gives way, your doctor may order an MRI. Here's what the scan can show, when it's usually recommended, and what the appointment is like, so you can walk in knowing what to expect. When you're ready, you can compare MRI centers near you.
What does a knee MRI show?
A knee MRI gives your doctor a detailed look at the structures inside the joint, especially the soft tissues. ColumbiaDoctors says the test can find problems in the knee joint, "such as arthritis, bone tumors, or infection, or damaged cartilage, meniscus, ligaments, or tendons." It can also help explain unexplained knee pain or a knee that gives out for no clear reason.
MedlinePlus lists several reasons a provider may order the test, including signs of damage to the knee muscle, meniscus, cartilage or ligaments, knee pain that doesn't get better with treatment, instability of the knee, and a knee that locks when you walk or move. ColumbiaDoctors adds that an MRI may also find a bone fracture when X-rays and other tests don't give a clear answer.
Common findings described on a report include a ligament or meniscus tear, changes common to arthritis, or a bone injury. A normal result, in MedlinePlus's words, "means your knee looks OK." Your doctor is the right person to explain what any finding means for you.
Do you need an X-ray before a knee MRI?
Often, yes. For adults with chronic (long-lasting) knee pain, X-rays are usually the first imaging test. The American College of Radiology's 2026 update to its Appropriateness Criteria for chronic knee pain, as summarized by HealthManagement.org, states that "radiography is usually appropriate as the first imaging test for adults with chronic knee pain."
MRI is typically the next step in specific situations. According to the same summary, MRI without intravenous contrast is usually appropriate when a tendon, meniscus or ligament problem is suspected, and may be appropriate when symptoms don't match what the X-rays show. Ultrasound, MRI, CT and several other tests are described as usually not appropriate as the very first imaging test for chronic knee pain.
This is one reason insurers sometimes ask for X-rays before approving an MRI. If you're paying out of pocket, our guide to what an MRI costs without insurance walks through self-pay options. If ongoing knee pain is the bigger question, a pain specialist can help you plan next steps; PainDocNearMe.com lists pain doctors by location.
How long does a knee MRI take, and what does it feel like?
Plan for about 30 to 60 minutes on the table. MedlinePlus says the test "most often lasts 30 to 60 minutes, but may take longer," and ColumbiaDoctors notes it can take as long as 2 hours. Allow extra time for check-in and changing.
You'll lie on a table that slides into the scanner. MedlinePlus explains that "an MRI exam causes no pain" and that the machine makes loud thumping and humming noises while it runs. ColumbiaDoctors adds that you'll hear a fan and feel air moving inside the scanner. Lying still matters, because movement can blur the pictures.
If tight spaces make you nervous, tell your doctor ahead of time. Both MedlinePlus and ColumbiaDoctors say a medicine may be offered to help you relax. Some people also look for scanners with a larger opening; see our comparison of open MRI vs. wide-bore MRI for claustrophobia.
How should you prepare for a knee MRI?
For most people there's little to do. ColumbiaDoctors says, "In general, there's nothing you have to do before this test, unless your doctor tells you to." A few things do matter:
- Leave metal behind. You'll need to remove metal objects such as jewelry, watches, hairpins, hearing aids and dentures. MedlinePlus notes that items like zippers and hairpins can distort the images.
- Tell the team about implants. MedlinePlus lists devices to mention, including a heart defibrillator or pacemaker, inner ear (cochlear) implants, and recently placed artificial joints or metal plates and screws.
- Mention kidney problems or pregnancy if your exam might use contrast, as ColumbiaDoctors advises.
- Wear comfortable clothes without metal, or expect to change into a gown.
Our MRI preparation checklist covers these steps in more detail.
Frequently asked questions
Can a knee MRI show a torn meniscus?
Yes. MedlinePlus lists damage to the meniscus among the reasons a knee MRI is ordered, and ColumbiaDoctors lists meniscus and ligament tears among possible abnormal results. The American College of Radiology rates MRI without contrast as usually appropriate when a meniscus problem is suspected in chronic knee pain.
Is a knee MRI done with contrast?
Many knee MRIs are done without contrast. For chronic knee pain, the American College of Radiology's 2026 guidance rates MRI without IV contrast as usually appropriate when a tendon, meniscus or ligament problem is suspected. Some exams do use a gadolinium-based contrast, and your doctor will tell you if yours does. Learn more in our guide to MRI with or without contrast.
How soon will I get my knee MRI results?
A radiologist reads the images and sends a report to your doctor. ColumbiaDoctors says complete results are usually ready for your doctor in 1 to 2 days. Your doctor will then go over what the report means for you.
Does a knee MRI use radiation?
No. MedlinePlus states that MRI uses no radiation. It uses a strong magnet and radio waves instead, and ColumbiaDoctors notes there are no known harmful effects from the magnetic field.
Can I get a knee MRI if I'm claustrophobic?
Often, yes. Tell your doctor before the scan, because a medicine may be offered to help you relax. Some imaging centers also offer scanners with a wider opening, so it's worth asking when you book.
Find an MRI near you
Once your doctor orders a knee MRI, you can find an MRI scan near you and compare locations, scanner types and appointment options. Browsing by area? Start with MRI centers in Texas or search the full directory for your state or city.
Sources: MedlinePlus (U.S. National Library of Medicine), "Knee MRI scan"; ColumbiaDoctors, "Magnetic Resonance Imaging (MRI) of the Knee" (current as of February 24, 2026); HealthManagement.org, "Radiographs Remain First Step in Chronic Knee Pain" (July 8, 2026), summarizing Bateni C, et al., "ACR Appropriateness Criteria Chronic Knee Pain: Update 2026," Journal of the American College of Radiology.
This article is for educational purposes and is not medical advice. Talk with your doctor about which scan is right for you.