MRI knee shows ligaments, cartilage and menisci that X-rays cannot see. Learn when it is advised, what it detects and how to prepare.
An MRI knee scan shows the ligaments, menisci, cartilage, tendons and bone inside the knee. It is the best test for sports injuries, locking, swelling, instability and unexplained knee pain, because X-rays only show bones.
What Does MRI Knee Show?
MRI shows soft structures in great detail. It can tell whether a ligament is fully torn or partly stretched, whether the meniscus has a tear, and how much cartilage has worn away. It can also find fluid, cysts, loose bodies and bone bruises. See what an MRI scan is.
StructureTypical problem seen on MRIACL, PCLTears after twisting injuryMeniscusTears causing clicking, locking, painCartilageWear or damage in arthritisTendonsPatellar or quadriceps tendon injuryBoneStress fracture, bone bruise, infectionWhen Is MRI Knee Advised?
- Knee injury during sport, a fall or a twisting movement
- Locking, giving way or catching
- Swelling or pain lasting more than a few weeks
- Pain with normal X-ray
- Before surgery such as ACL repair or arthroscopy
- Suspected infection or tumour
Do I Need Contrast?
Most knee MRIs are done without contrast. Contrast is used for suspected infection, tumour or after surgery in selected cases. See MRI with contrast.
Preparation and Procedure
- No fasting is needed.
- Wear loose shorts or a gown; remove metal.
- Tell the staff about knee implants or past surgery. See MRI safety.
- You lie on your back with the knee in a coil. The scan takes about 20 to 30 minutes.
Read MRI procedure.
Understanding Common Findings
Reports often mention degenerative changes, small joint effusion, mild meniscus wear or cartilage thinning. These are common after age 40 and may not need surgery. Treatment is based on your symptoms, strength and examination. Physiotherapy, weight control and activity changes help many people. See how to read your MRI report.
A Practical Example
Aditya, 27, twists his knee while playing football and feels it give way. His X-ray is normal, but MRI shows an ACL tear with a bone bruise. His orthopaedic surgeon plans physiotherapy and surgery. Another patient, 62-year-old Leela, has knee pain with mild cartilage wear on MRI and begins exercises, with injections later if needed. The MRI result matched each treatment plan.
Quick Summary
- MRI is the best test for knee ligaments, menisci and cartilage
- X-ray shows bone only
- No fasting; 20 to 30 minutes
- Treatment depends on symptoms, not only the picture
Questions to Ask Your Doctor
- Is my knee pain likely from a ligament or meniscus tear?
- Do I need surgery, or can physiotherapy help first?
- Should I avoid sports until I get the report?
- Is a repeat scan needed later?
Common Mistakes to Avoid
- Moving the knee during the scan, which blurs images.
- Forgetting to mention a knee implant or old surgery.
- Wearing jeans with metal rivets.
Booking, Timing and Report
Book a slot of about 45 to 60 minutes, and arrive 15 minutes early for the safety form. Carry your doctor's prescription, implant cards and old scans. Reports are usually ready within 24 to 48 hours, and you can request images on a CD or digital link for your specialist.
Care Tips While You Wait for the Report
Rest the knee, apply a cold pack for 15 minutes a few times a day, use a knee support if advised, and avoid twisting or squatting. Take only the pain medicine your doctor has prescribed. Seek urgent care if the knee is hot, red, swollen with fever, or if you cannot bear weight. Strengthening the thigh muscles helps many knee problems, but start only after your doctor or physiotherapist approves the plan. If you are overweight, losing even a few kilograms reduces the load on your knees. See MRI shoulder scan for another joint scan.
Frequently Asked Questions
When should I get a knee MRI?
When injury or pain persists, or when locking, giving way or swelling occurs.
Can MRI show ACL tears?
Yes, very accurately.
Is MRI better than X-ray for the knee?
For ligaments and cartilage, yes.
Do I need contrast?
Usually not.
How long does it take?
About 20 to 30 minutes.
Can I have it with a knee replacement?
Yes, usually, but images near the metal may blur.
Can I walk after the scan?
Yes, immediately.
Does MRI show arthritis?
Yes, including early cartilage change.
When is the report ready?
Usually 24 to 48 hours.
Book Your Test at Ganesh Diagnostic
Ganesh Diagnostic & Imaging Centre in Rohini, Delhi offers this test with trained radiology staff and clear reports. You can book an appointment online, check our branches across Delhi NCR, contact us for current rates, or explore all our services. Reports can be downloaded online through our patient portal, so you do not need to make a second trip just to collect them.
This article is for general information only. It does not replace advice from your doctor. Always follow your doctor's instructions for your test.
