Do You Actually Need an MRI? A Portland Physical Therapist Explains When Imaging Helps (And When It Doesn't)
One of the most common questions I hear from patients is:
"Do you think I need an MRI?"
It's a fair question.
Whether you're dealing with back pain, knee pain, shoulder pain, or a running injury, most people just want answers. They want to know what's wrong and what they should do next.
The problem is that MRI findings don't always provide those answers.
In fact, one of the most important parts of my job as a physical therapist is helping people determine when imaging is likely to be helpful and when it may simply add more noise to the conversation.
More Information Isn't Always Better Information
MRI technology is incredible.
The challenge is that it often finds abnormalities that may have little or nothing to do with your pain.
A landmark study published in the New England Journal of Medicine found that 52% of adults without back pain had a disc bulge on MRI and 27% had a disc protrusion despite having no symptoms whatsoever. (Jensen et al., 1994)
In other words:
Just because something shows up on an MRI doesn't mean it's causing your pain.
That's why we always start with the person, not the picture.
When an MRI Usually Doesn't Change Treatment
Low Back Pain
This is one of the biggest misconceptions in healthcare.
Many people assume that if their back hurts, they need an MRI.
In reality, most episodes of low back pain improve without imaging.
Even when an MRI reveals:
Disc degeneration
Disc bulges
Mild arthritis
Facet joint changes
The treatment often remains remarkably similar:
Improve movement
Build strength
Gradually increase activity
Address lifestyle and recovery factors
Restore confidence
This is why most clinical guidelines recommend against routine MRI for uncomplicated low back pain unless significant neurological symptoms or other red flags are present.
Degenerative Meniscus Tears
Many active adults develop knee pain, get an MRI, and discover they have a meniscus tear.
The problem?
Many adults over 40 have meniscus tears that never cause symptoms.
For many people, structured strength training and activity modification can be just as effective as surgical intervention.
Rotator Cuff Tears
Shoulder MRIs often reveal partial thickness tears, tendinosis, and other findings that sound scary on paper.
Yet many people with these findings continue to function at a high level without surgery.
The MRI may confirm what we already suspect, but it doesn't always change the treatment plan.
When Imaging Can Change Everything
While imaging isn't always necessary, there are situations where it can dramatically impact decision making.
Suspected Bone Stress Injuries
Recently, I evaluated a triathlete in the middle of a peak training block preparing for an upcoming race.
She presented with pain around the inside of her knee and upper tibia that worsened with running, hopping, landing, and impact activities.
On paper, many of her findings were reassuring.
Her strength was excellent.
Several common knee diagnoses became less likely as the evaluation progressed.
Yet impact loading continued to provoke symptoms, and her training history raised concern for a potential bone stress injury.
Did she definitely have a stress fracture?
No.
Did she definitely need an MRI?
Not necessarily.
But here's the important question:
Would imaging change what we do next?
Absolutely.
If she had a developing bone stress injury, continuing to train through it could allow the condition to progress into a true stress fracture, potentially costing months of training and recovery.
In this situation, imaging wasn't about curiosity.
It was about making a better decision.
This is a great example of how MRI can become an important tool when the consequences of missing a diagnosis are significant.
Significant Traumatic Injuries
Imaging may also be appropriate following:
A suspected ACL tear
A traumatic knee injury
A shoulder dislocation
A tendon rupture
A fracture
In these cases, imaging may help determine whether surgical consultation is necessary and guide the rehabilitation process.
Persistent Symptoms That Aren't Improving
If you've been following a well-designed treatment plan and symptoms continue to worsen or fail to improve over time, imaging may provide valuable information that helps refine the diagnosis and treatment strategy.
The Question We Always Ask
Not:
"Can we get an MRI?"
But:
"Will the MRI change what we do?"
That's the question that matters.
If imaging won't change treatment, then it may not be the best next step.
If imaging will meaningfully influence decision making, then it becomes a valuable tool.
Our Approach at Engine Room
At Engine Room Performance Physical Therapy in Portland, Maine, we are not anti-imaging.
We're also not pro-imaging.
We're pro-decision making.
Sometimes the right answer is an MRI.
Sometimes the right answer is a comprehensive evaluation, a strength program, and a little patience.
Our job is to help you understand the difference.
If you're dealing with persistent back pain, knee pain, shoulder pain, a running injury, or simply aren't sure whether imaging is the right next step, we'd be happy to help.
You don't need more information.
You need the right information.
And sometimes, that starts with a conversation.
