Do You Need an MRI? When a Scan Helps and When It Does Not

What Is an MRI?

Magnetic resonance imaging (MRI) uses a strong magnetic field and radio waves to produce detailed pictures of soft tissues, such as discs, ligaments, tendons, cartilage and nerves, as well as bone. It does not use ionising radiation, unlike X-rays and CT scans.

Physiotherapy assessment at JW Physio Clinic in Loughton before any scan referral — JW Physio Clinic, Ambrose House, Old Station Road, Loughton

Why Most Aches and Pains Do Not Need One

The great majority of musculoskeletal problems can be assessed, diagnosed and treated without imaging. A detailed history and examination give a physiotherapist most of the information they need. Many people also have scan findings, such as disc bulges or cartilage changes, that cause no symptoms at all. Finding these on a scan can create unnecessary worry or lead to treatment that does not help.

When an MRI Can Help

An MRI may be useful when:

There are red-flag symptoms that need to be ruled out
A suspected structural injury, such as a significant ligament, meniscus or tendon tear, would change management
Symptoms are not improving as expected despite appropriate treatment
Surgery or an injection is being considered, and the scan will guide the decision
The diagnosis is unclear after a thorough examination

When It May Not Help

Recent-onset back pain without red flags
Pain that is improving with treatment
Mild or short-lived symptoms
Situations where the result would not change what is done

How Private MRI Referral Works Through Us

It starts with a physiotherapy assessment. If your assessment suggests a scan would add useful information, we can refer you onward to a private imaging provider, based on your clinical findings so that the right area is scanned and the report answers the right questions. You book directly with the provider at a time that suits you, and results are shared with you and back to us so we can use them to guide your plan. Private scans are often quicker to arrange than NHS imaging for non-urgent problems, though availability varies by provider and scan type.

Preparing for an MRI

Tell the imaging team about any metal in your body, implants, pacemakers or previous surgery
Remove jewellery and metal items
Wear comfortable clothes without metal fasteners
Let them know if you are claustrophobic, as options can help
Be ready to lie still for the duration of the scan

What Happens After the Scan?

A radiologist writes a report, and we interpret it together with your symptoms and examination findings. Some findings change the plan, while others are incidental. We explain what the result means in plain English and what to do next.

Scan Findings Are Not Always the Cause of Pain

Imaging reports often list findings such as disc degeneration, small tears or arthritis changes. These are common as we age, including in people without pain. A good clinician looks at how the findings match your symptoms and examination, and does not treat the scan alone.

Questions to Ask Before a Scan

What are we hoping to learn from this scan?
Will the result change my treatment?
What are the alternatives, such as ultrasound?
How quickly can I get the scan and the report?
Will my insurer cover it?

Frequently Asked Questions

Usually not at first. Most back pain improves without a scan, and an MRI is generally considered only if red-flag symptoms are present, symptoms are not improving, or an injection or surgery is being considered.

Yes, a private MRI can be arranged through a physiotherapist or private provider after assessment. Check with your insurer if you plan to claim.

They show different things. An MRI shows soft tissues in more detail, while an X-ray is better for bone. The right test depends on your problem.

It varies by scan type and area. Your imaging provider will tell you when you book.

Talk to the JW Physio Clinic team

Book an appointment at our Loughton clinic. No GP referral is needed, and same-week appointments are usually available.

Book an Appointment MRI referral in Loughton