Medically reviewed by Prof. Dr. Aamer Nadeem Chaudhary, M.B.B.S., D.M.R.D., F.C.P.S. (Diagnostic Radiology), Consultant, Al-Nasar Lab & Diagnostic Centre. Updated November 2026.
Quick answer: An ankle MRI shows ligaments, tendons, cartilage and bone marrow in detail an X-ray cannot. It is most useful when an ankle still hurts or keeps giving way six weeks or more after a sprain, or when an Achilles tendon or cartilage injury is suspected. Most ankle MRI scans need no injection, take 25 to 40 minutes, and you go in feet first, so your head usually stays outside the scanner.
Book an ankle MRI: call 0300 0341944. MRI is performed at our main Johar Town campus.
Most sprains do not need an MRI
A typical rolled ankle injures the ligaments on the outside of the joint. The great majority heal well with a short period of protection, then a gradual return to walking and specific exercises. Imaging adds little in the first weeks.
An X-ray is used straight after injury when a fracture is possible, for example if you cannot take four steps, or there is tenderness over specific bony points. MRI comes later, for the ankle that does not recover as expected.
When an ankle MRI is worth doing
- Pain or swelling lasting more than six weeks after a sprain despite rest and physiotherapy
- The ankle keeps giving way on uneven ground
- A deep ache inside the joint, sometimes with catching or locking
- A suspected Achilles tendon tear, especially a partial one
- Pain behind the inner ankle with a flattening arch, which can mean a tendon problem
- A suspected stress fracture in a runner or someone who has recently increased walking
- Planning ankle surgery
What an ankle MRI can find
| Structure | Common finding |
|---|---|
| Outer ankle ligaments | Partial or complete tears after rolling the ankle |
| High ankle ligaments (syndesmosis) | A “high ankle sprain”, slower to heal and easily missed |
| Achilles tendon | Tendinopathy, partial or complete tears |
| Tibialis posterior and peroneal tendons | Tears or inflammation behind the ankle bones |
| Talus cartilage | Osteochondral lesion, a damaged patch of joint surface that causes deep pain long after a sprain |
| Bone marrow | Bone bruises and stress fractures invisible on X-ray |
| Plantar fascia | Thickening in heel pain, if the scan includes the heel |
The cartilage injury deserves a particular mention. A damaged patch on the dome of the talus is a common reason an ankle “never felt right” after a sprain, and it is invisible on X-ray in the early stages. MRI is the test that finds it.
Achilles tendon: ultrasound or MRI?
Both can image the Achilles. Ultrasound is quick, low cost and lets the radiologist watch the tendon move, which suits a straightforward tear or tendinopathy. MRI shows the tendon along with the surrounding bone and joint, which helps when the diagnosis is unclear or surgery is being planned. Your doctor will choose based on the question.
What happens during the scan
You lie on your back and go into the scanner feet first. The ankle sits inside a small coil and is supported with pads so it stays still. For most ankle scans your head stays outside the bore, which helps anyone uneasy in enclosed spaces.
The scanner is loud, and ear protection is provided. Keeping the foot completely still during each sequence of a few minutes is the most important thing you can do for a clear result.
Contrast is rarely needed for an ankle. It is used mainly for suspected infection, inflammatory arthritis or a mass.
How to prepare
- No fasting is needed
- Tell the team about any implant: pacemaker, defibrillator, cochlear implant, neurostimulator, aneurysm clip, or metal fragments in the eye
- Ankle plates and screws are usually MRI safe, though metal distorts nearby images. Bring details of any previous ankle surgery
- Wear loose trousers you can roll up, and remove socks with metallic threads
- Bring X-rays and previous reports
Related reading: knee MRI, hip MRI and what to expect from an MRI.
Ankle MRI at Al-Nasar Lab
Al-Nasar Lab & Diagnostic Centre has served Lahore since 1996 and holds ISO 15189:2022 accreditation from the Pakistan National Accreditation Council. MRI, X-ray and ultrasound are available at our Johar Town campus and reported by consultant radiologists, so the right test can be chosen for your injury.
See our accreditations, find your nearest location, or contact us to book.
Frequently Asked Questions
Do I need an MRI for a sprained ankle?
Usually not. Most sprains heal with rest and physiotherapy. An MRI is worth considering if pain or instability lasts more than six weeks.
Will my head go inside the scanner for an ankle MRI?
For most ankle scans, no. You go in feet first and your head usually stays outside.
Does an ankle MRI need an injection?
Rarely. Contrast is mainly used for suspected infection, inflammatory arthritis or a mass.
Can I have an ankle MRI with plates or screws?
Usually yes. Most orthopaedic implants are MRI safe, though they distort the images close to them.
How long does an ankle MRI take?
About 25 to 40 minutes.
This article is for general information and is not a substitute for medical advice. Please discuss your results with a qualified doctor.
