← MRI Terms

How to Read Your Spine MRI Report: A Plain-Language Guide for Patients

A spine MRI report is a radiologist’s description of what the images show, but the key is matching those findings to your symptoms, exam, and the specific nerve or spinal level involved.

MRI stands for magnetic resonance imaging. It uses magnets to create detailed pictures of your spine. A radiologist is a doctor who reads imaging tests and writes the report.

If your report feels scary, take a breath. Many MRI words sound worse than they are. Terms like “degenerative,” “disc bulge,” “disc desiccation,” “arthritis,” or “mild stenosis” do not automatically mean you need surgery.

The report matters most when the finding lines up with your symptoms and exam.

Start Here: An MRI Report Is Not a Diagnosis by Itself

An MRI report describes anatomy. Anatomy means the structure of your spine.

It can show:

  • Discs
  • Nerves
  • Bones
  • Joints
  • Ligaments
  • The spinal canal
  • The spinal cord in the neck and upper back

But an MRI report is not a full diagnosis by itself.

A diagnosis usually combines:

  • Your symptoms
  • A physical exam
  • MRI findings
  • Your medical history
  • Sometimes X-rays, CT scans, EMG tests, injections, or blood tests

A CT scan is a detailed X-ray test that shows bone well. EMG stands for electromyography. It is a nerve and muscle test. A spinal injection may help show whether a certain nerve or joint is causing pain.

In my practice, I do not treat the MRI report alone. I treat the patient, and the MRI is one piece of the puzzle.

Many people have “abnormal” spine MRI findings and no pain. That does not mean MRI is useless. It means the report must be read in context.

The main question is:

Does the MRI finding match what you feel?

The Basic Parts of a Spine MRI Report

Most spine MRI reports follow a similar format.

1. Patient and Exam Information

This section lists basic details about the test.

It may say:

  • Cervical spine MRI
  • Thoracic spine MRI
  • Lumbar spine MRI
  • MRI with contrast
  • MRI without contrast
  • Reason for the scan

The cervical spine is your neck.
The thoracic spine is your upper and mid-back.
The lumbar spine is your lower back.

Contrast is a dye given through an IV. It can help show infection, tumor, inflammation, scar tissue, or certain other problems. Many routine spine MRIs are done without contrast.

The “indication” is the reason the MRI was ordered. For example, it may say “low back pain,” “left leg pain,” “neck pain,” or “right arm numbness.”

2. Technique

The technique section explains how the MRI was performed.

It may list MRI “sequences.” A sequence is a way the MRI captures tissue. Different sequences show water, fat, bone marrow, discs, nerves, and swelling in different ways.

Most people do not need to interpret this section in detail.

3. Findings

The findings section is the detailed part of the report.

It often goes level by level.

It may describe:

  • Discs
  • Nerves
  • The spinal canal
  • Foraminal openings
  • Facet joints
  • Ligaments
  • Alignment
  • Bone marrow signal

A foramen is the side opening where a nerve exits the spine. The plural is foramina. Bone marrow signal means how the inside of the bone looks on MRI.

This section can be long. It may list several findings that are not all causing symptoms.

4. Impression

The impression is the radiologist’s summary.

This is often the best place to start. It usually lists the most important findings.

But do not ignore the detailed findings. Sometimes the details include useful information that is not fully repeated in the impression.

How to Read the “Levels” in Your Spine MRI

Spine reports use levels. A level is the space between two spinal bones.

Each spinal bone is called a vertebra. More than one is called vertebrae.

Cervical Spine Levels

The cervical spine is the neck.

Common cervical levels include:

  • C2-3
  • C3-4
  • C4-5
  • C5-6
  • C6-7
  • C7-T1

The “C” stands for cervical. The “T” stands for thoracic.

Neck problems can affect nerves that travel into the shoulder, arm, and hand. This is called cervical radiculopathy. Radiculopathy means pain, numbness, tingling, or weakness caused by irritation or compression of a spinal nerve.

For example, a pinched nerve in the neck may cause arm pain or hand numbness if the MRI level and side match the symptom pattern.

Learn more:

Lumbar Spine Levels

The lumbar spine is the lower back.

Common lumbar levels include:

  • L1-2
  • L2-3
  • L3-4
  • L4-5
  • L5-S1

The “L” stands for lumbar. The “S” stands for sacrum, which is the bone at the base of the spine.

Lumbar nerve compression can cause pain traveling into the buttock, thigh, calf, or foot. This is often called sciatica. Sciatica means pain that travels down the leg from irritation of a nerve in the lower back.

Learn more:

Common Spine MRI Words and What They Usually Mean

This is the section most people need when they first open their report.

Disc Desiccation or Disc Dehydration

A spinal disc is the cushion between two vertebrae.

Disc desiccation means the disc has lost water signal on MRI. Disc dehydration means the same thing.

This is common with aging. It does not automatically mean the disc is painful.

A disc can look darker or flatter on MRI and still not be the main reason you hurt.

Learn more:

  • Degenerative Disc Disease Lumbar
  • Pfirrmann Grading Explained

Disc Bulge, Protrusion, Extrusion, and Sequestration

These terms describe the shape of disc material.

A disc bulge is a broad pushing out of the disc edge.

A disc protrusion is a more focused herniation. A herniation means disc material has moved beyond its usual border.

A disc extrusion means the disc material has pushed farther out and may have a narrower base.

A disc sequestration means a disc fragment has separated from the main disc.

Size matters less than location.

A small disc herniation in the wrong place can irritate a nerve, while a larger-looking bulge may not matter much if it is not touching anything important.

The key question is whether the disc contacts or compresses a nerve that matches your symptoms.

Learn more:

Annular Fissure or Annular Tear

The annulus is the outer ring of a disc.

An annular fissure is a crack or separation in that outer ring. Some reports call it an annular tear.

This can be painful in some cases. It can also be an incidental finding. Incidental means it is seen on MRI but may not be the cause of symptoms.

Learn more:

  • Annular Fissure and High-Intensity Zone

Central Canal Stenosis

Stenosis means narrowing.

The central canal is the main tunnel in the spine. It holds the spinal cord in the neck and upper back. In the lower back, it holds nerve roots.

Central canal stenosis means narrowing of that main tunnel.

In the neck, severe central canal stenosis can raise concern for spinal cord compression. The spinal cord is the main nerve pathway between your brain and body.

Spinal cord compression can sometimes lead to myelopathy. Myelopathy means the spinal cord is not working normally.

In the lower back, central canal stenosis can cause leg pain, heaviness, or weakness when standing or walking. This pattern is often called neurogenic claudication. That means leg symptoms caused by nerve crowding in the spine.

Learn more:

Foraminal Narrowing

Foraminal narrowing means narrowing of the side opening where a nerve exits the spine.

The foramen is the exit doorway for the nerve.

This finding can matter if it matches arm or leg pain on the same side and in the right nerve pattern.

For example, right-sided foraminal stenosis may matter more if your symptoms are also on the right.

Learn more:

Lateral Recess Stenosis

The lateral recess is a small pathway inside the spinal canal where a nerve travels before it exits.

Lateral recess stenosis means narrowing in that pathway.

This is often important in the lower back. It can irritate or compress a nerve root and cause leg pain, numbness, tingling, or weakness.

Learn more:

Facet Arthropathy or Facet Hypertrophy

Facet joints are small joints in the back of the spine.

Facet arthropathy means arthritis-type wear in these joints. Facet hypertrophy means the joints are enlarged or overgrown.

These changes can contribute to back pain or stenosis. They can also be age-related and not the main pain source.

Learn more:

Ligamentum Flavum Hypertrophy

The ligamentum flavum is a ligament inside the spinal canal. A ligament is a strong band of tissue that connects bones.

Hypertrophy means thickening or enlargement.

Ligamentum flavum hypertrophy means this ligament has thickened. It can take up space in the spinal canal and contribute to stenosis.

Learn more:

Spondylosis, Spondylolisthesis, and Spondylolysis

These words sound similar, but they mean different things.

Spondylosis means wear-and-tear or arthritis-type changes in the spine.

Spondylolisthesis means one vertebra has slipped compared with the one below it.

Spondylolysis means a stress fracture or defect in part of a vertebra, often in a small bridge of bone near the back of the spine.

Spondylolisthesis is often graded by how much slip is present. One common system is called the Meyerding classification.

Learn more:

  • Spondylosis vs. Spondylolisthesis vs. Spondylolysis
  • Spondylolisthesis: When the Bones Slip
  • Listhesis Grading I Through V
  • Retrolisthesis

Modic Changes and Endplate Changes

Endplates are the bony surfaces above and below a disc.

Modic changes are MRI signal changes in the bone next to a disc. Signal means how tissue appears on MRI.

These changes can be related to disc degeneration. Some types may correlate with back pain in some people. But they do not prove the pain source by themselves.

Learn more:

  • Modic Changes Type 1, 2, and 3 Explained
  • Vertebral Endplates
  • Vertebrogenic Pain

T2 Signal Changes

T2 is one type of MRI sequence.

A T2 signal change means something looks different on that type of MRI image. The meaning depends on where the signal is seen.

In discs, T2 signal often relates to hydration. A healthy disc often has more water signal.

In bone, T2 signal may suggest edema. Edema means extra fluid or swelling in tissue.

In the spinal cord, T2 signal change can be more concerning. It may suggest irritation or injury in the cord, especially if there is cord compression.

T2 cord signal should be interpreted carefully with symptoms and exam findings.

Learn more:

  • T2 Signal Changes on Spine MRI

Mild, Moderate, and Severe: What These Words Really Mean

MRI reports often use words like:

  • Mild
  • Moderate
  • Severe

These are descriptive terms. They can vary between radiologists.

“Mild” often means the finding is present but may not be clinically important.

“Moderate” means the finding is more noticeable. Symptoms still matter.

“Severe” deserves closer attention, especially if nerves or the spinal cord are compressed.

But severity on MRI does not always equal severity of pain.

A severe imaging finding can exist in someone with manageable symptoms. A smaller disc herniation can cause severe nerve pain if it hits the wrong spot.

The finding matters most when the severity, location, and side of the MRI abnormality match what the patient is feeling.

The Most Important Question: Does the MRI Match Your Symptoms?

This is the most important part of reading a spine MRI report.

What I look for on MRI is not just whether something is abnormal, but whether it explains the patient’s exact pattern of pain, numbness, or weakness.

Back or Neck Pain Alone

Back or neck pain alone can be harder to match to one MRI finding.

Several findings may be related to pain, including:

  • Disc degeneration
  • Facet arthritis
  • Modic changes
  • Alignment problems
  • Muscle or soft tissue issues

But these same findings can also appear in people without pain.

This is why pinpointing the exact pain generator can be difficult.

Arm or Leg Pain

Pain traveling into the arm or leg is more likely to involve nerve irritation or nerve compression.

Nerve compression means a nerve is being squeezed or crowded.

For the MRI finding to be more meaningful, the location should match:

  • The side of your symptoms
  • The level of the spine
  • The nerve pattern

For example, left-sided leg pain may fit better with a left-sided lumbar nerve finding than a right-sided finding.

Learn more about sciatica.

Numbness, Tingling, or Weakness

Numbness means reduced feeling. Tingling can feel like pins and needles.

Weakness means a muscle is not working with normal strength.

These symptoms can suggest nerve involvement.

New or progressive weakness should be evaluated promptly. Progressive means it is getting worse.

Walking Problems, Balance Trouble, or Hand Clumsiness

In cervical spine disease, walking trouble, balance problems, or hand clumsiness can be signs of myelopathy.

Myelopathy means the spinal cord is not working normally.

This deserves timely medical attention, especially if symptoms are new or worsening.

Learn more:

  • Cervical Spinal Stenosis & Cervical Myelopathy
  • Sciatica
  • Cauda Equina Syndrome

Findings That Often Sound Scary but Are Common

Some MRI findings sound alarming but are common, especially with age.

These include:

  • Degenerative changes: Arthritis-type or wear-and-tear changes. These may matter, but they are also common.
  • Disc desiccation: Loss of water signal in a disc. This is common with aging.
  • Small disc bulge: A broad disc shape change. It may not matter if it is not pressing on a nerve.
  • Mild facet arthropathy: Mild arthritis in the small joints of the spine.
  • Schmorl’s nodes: Small areas where disc material pushes into the nearby vertebral endplate. They are often old or incidental, but context matters.
  • Mild scoliosis or curvature: Scoliosis means a side-to-side curve of the spine. Mild curves may or may not relate to symptoms.
  • Mild retrolisthesis: Retrolisthesis means one vertebra has shifted slightly backward compared with the one below it.
  • Mild foraminal narrowing: Mild narrowing of the nerve exit opening.

These findings are real. But real does not always mean dangerous. Real also does not always mean painful.

Learn more:

  • Schmorl’s Nodes
  • Adult Degenerative Scoliosis
  • Cobb Angle Measurement

Findings That Deserve More Attention

Some MRI findings deserve more careful review. This does not always mean surgery. It does mean the finding should be matched closely with symptoms and exam.

Findings that deserve more attention include:

  • Severe central canal stenosis: Severe narrowing of the main spinal canal.
  • Spinal cord compression: Pressure on the spinal cord.
  • T2 cord signal change: A signal change inside the spinal cord on MRI.
  • Severe foraminal stenosis with matching nerve symptoms: Severe narrowing of the nerve exit opening with arm or leg symptoms in the same nerve pattern.
  • Large disc extrusion or sequestration with weakness: A larger disc herniation or separated disc fragment plus muscle weakness.
  • Possible infection: Infection means germs may be affecting the spine or disc space.
  • Possible tumor: A tumor is an abnormal growth. It may be benign or cancerous.
  • Possible fracture: A fracture is a break in bone.
  • Inflammatory findings: Inflammation means the immune system is active in a tissue.
  • Compression fracture: A collapse or crush-type break in a vertebra.
  • Cauda equina compression: Pressure on the bundle of nerves at the bottom of the spinal canal.

Cauda equina means “horse’s tail.” It is the group of nerves at the lower end of the spine. Compression of these nerves can be serious.

Learn more:

  • Cauda Equina Syndrome
  • Vertebral Compression Fractures
  • Cervical Spinal Stenosis & Cervical Myelopathy

A Simple Step-by-Step Way to Read Your MRI Report

Use this framework when you read your report.

Step 1: Read the Impression First

Start with the impression.

Ask:

  • What are the main findings?
  • Are any findings described as severe?
  • Does the report mention nerve compression, spinal cord compression, fracture, infection, tumor, or cauda equina compression?

Step 2: Identify the Spinal Region

Look for the region:

  • Cervical means neck.
  • Thoracic means upper or mid-back.
  • Lumbar means lower back.

Make sure you are reading the correct MRI for your symptoms.

Step 3: Look for the Level and Side

Find the level and side.

Examples:

  • Left L5-S1 foraminal stenosis
  • Right C5-6 disc protrusion
  • Central L4-5 canal stenosis

“Left L5-S1 foraminal stenosis” may matter more if your symptoms are on the left and match the L5 or S1 nerve pattern.

Step 4: Separate Disc, Bone, Joint, and Nerve Findings

Group the findings.

Disc findings:

  • Bulge
  • Protrusion
  • Extrusion
  • Sequestration
  • Desiccation

Bone findings:

  • Modic changes
  • Endplate changes
  • Fracture
  • Marrow signal changes

Joint findings:

  • Facet arthropathy
  • Facet hypertrophy

Nerve, canal, and cord findings:

  • Central canal stenosis
  • Foraminal stenosis
  • Lateral recess stenosis
  • Nerve compression
  • Spinal cord compression

Step 5: Ask Whether the Finding Matches Your Symptoms

This is the clinical correlation step.

Clinical correlation means matching the MRI with your symptoms, exam, and medical history.

Ask:

  • Is the finding on the same side as my symptoms?
  • Does the level match where my pain travels?
  • Are there numbness, tingling, or weakness signs that match the nerve?
  • Is the MRI finding old, mild, or common for age?
  • Are there red-flag symptoms?

Step 6: Decide What Kind of Follow-Up Is Appropriate

The next step depends on the report and your symptoms.

Common next-step categories include:

  • Routine discussion of the MRI with your treating clinician
  • Spine specialist evaluation
  • Physical therapy or non-surgical care discussion
  • Further testing, such as X-rays, CT, EMG, labs, or injections
  • Urgent in-person care for red flags

An MRI report can guide the next step. It should not be used alone to make major treatment decisions.

When to Seek Urgent Medical Care

Most spine MRI findings are not emergencies. However, certain symptoms should not wait for a routine appointment or online MRI review. Seek urgent medical care if you have new bowel or bladder loss, numbness in the groin or saddle area, new or worsening weakness, rapidly worsening walking or balance problems, fever with severe spine pain, major trauma, or a history of cancer with new severe spine pain.

Seek urgent medical care now — not a routine online review — if you have any of the following:

  • New loss of bladder or bowel control
  • Numbness in the groin or saddle area
  • New or rapidly worsening leg weakness
  • Trouble walking that is new or getting worse
  • Severe neck pain with new hand clumsiness, balance problems, or weakness
  • Fever, chills, or concern for spinal infection
  • New severe back pain after a fall or injury
  • History of cancer with new severe or unexplained spine pain

SpineClarity is not an emergency service. If you have red-flag symptoms, you should seek urgent in-person medical care.

Learn more:

  • Cauda Equina Syndrome

When a Written MRI Review Can Help

A written MRI review can help when the report is hard to understand.

It may be useful if:

  • Your report contains many findings and you do not know which ones matter.
  • Your symptoms and MRI wording seem confusing.
  • You have been told different things by different clinicians.
  • You want a plain-language explanation before or after a specialist appointment.
  • You want help understanding likely next-step categories, not emergency treatment.

When I review a spine MRI for a patient, I try to separate the background wear-and-tear findings from the findings that may actually be driving the symptoms.

A written review can explain what the report likely means. It can also explain what findings may deserve more attention. But it cannot replace an in-person exam. It is also not the right choice for red-flag symptoms.

FAQ: How to Read Your Spine MRI Report

1. Does an abnormal spine MRI mean something is seriously wrong?

No. An abnormal MRI does not always mean something serious is wrong.

Many people have disc degeneration, small disc bulges, arthritis-type changes, or mild narrowing on MRI without major symptoms.

The key is whether the finding matches your symptoms, exam, and medical history.

2. Can an MRI show the exact cause of my back or neck pain?

Sometimes it can point to a likely cause. But it does not always show the exact pain source.

Back and neck pain can come from discs, joints, nerves, muscles, bones, or more than one area. Some MRI findings are also common in people without pain.

MRI is most helpful when the finding matches your pain pattern and exam.

3. What does “degenerative changes” mean on a spine MRI?

Degenerative changes mean wear-and-tear or age-related changes.

This can include disc dehydration, arthritis in the facet joints, bone spurs, or mild narrowing.

Degenerative does not mean your spine is falling apart. It also does not automatically mean surgery is needed.

4. Is a disc bulge the same as a herniated disc?

Not exactly.

A disc bulge is broad-based. It means the disc edge pushes out over a wider area.

A herniated disc is more focal. Protrusion and extrusion are types of disc herniation.

The most important question is whether the disc is touching or compressing a nerve that matches your symptoms.

5. What does mild, moderate, or severe stenosis mean?

Stenosis means narrowing.

Mild stenosis means the narrowing is present but often less crowded. Moderate means more noticeable narrowing. Severe means the space is significantly narrowed.

These words still need clinical correlation. A severe MRI finding does not always mean severe pain. A smaller finding can cause strong symptoms if it affects the right nerve.

6. What does it mean if my MRI says a nerve is compressed?

Nerve compression means a nerve is being squeezed or crowded.

This may cause pain, numbness, tingling, or weakness if it matches the nerve pattern. For example, a compressed lumbar nerve may cause leg symptoms. A compressed cervical nerve may cause arm symptoms.

The side and level matter.

7. Why do my symptoms not match my MRI report?

There are several reasons.

The MRI may show age-related findings that are not causing symptoms. Your pain may come from a structure that is hard to confirm on MRI. Or the symptoms may come from a different level or even a non-spine cause.

This is why the physical exam and history matter.

8. When should I worry about spinal cord compression?

Spinal cord compression deserves more attention when it is linked with symptoms of myelopathy.

These symptoms can include:

  • Hand clumsiness
  • Balance trouble
  • Trouble walking
  • Weakness
  • Numbness
  • Coordination problems

If these symptoms are new or getting worse, seek timely in-person medical care.

9. Do I need surgery because of my MRI findings?

Not based on the MRI report alone.

Many MRI findings are treated without surgery. Some findings may need closer specialist review, especially if there is weakness, severe nerve compression, spinal cord compression, or red-flag symptoms.

Treatment decisions should be based on the full picture, not just one phrase in the report.

10. Can SpineClarity tell me what my MRI report means?

Yes. SpineClarity can provide a written, plain-language MRI and case review from a board-certified spine surgeon.

The review can explain what the findings likely mean and suggest a next-step category.

It is not emergency care. It does not replace a treating physician or an in-person evaluation.

Image and Diagram Suggestions

Diagram: How to Read a Spine MRI Report in 6 Steps

Purpose: Show a simple flowchart for reading the report.

Flow:

  1. Read the impression
  2. Identify the spine region
  3. Find the affected level
  4. Check the side: left, right, or central
  5. Identify what is involved: disc, joint, canal, foramen, nerve, cord, bone
  6. Ask: does this match the symptoms?

Suggested alt text: “Flowchart showing six steps to read a spine MRI report, from the impression to matching findings with symptoms.”

Optional Inset Diagram: Basic Lumbar Spine Anatomy

Purpose: Help readers understand common MRI terms.

Show:

  • Disc
  • Spinal canal
  • Foraminal opening
  • Nerve root
  • Facet joint

Suggested alt text: “Simple lumbar spine diagram labeling the disc, spinal canal, foraminal opening, nerve root, and facet joint.”

Related Articles

Related reading

References

American College of Radiology. (2021). ACR Appropriateness Criteria® Low Back Pain.

Aprill, C., & Bogduk, N. (1992). High-intensity zone: A diagnostic sign of painful lumbar disc on magnetic resonance imaging. British Journal of Radiology, 65(773), 361-369.

Brinjikji, W., Luetmer, P. H., Comstock, B., et al. (2015). Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. AJNR American Journal of Neuroradiology, 36(4), 811-816.

Davies, B. M., Mowforth, O. D., Smith, E. K., & Kotter, M. R. N. (2018). Degenerative cervical myelopathy. BMJ, 360, k186.

Fardon, D. F., Williams, A. L., Dohring, E. J., Murtagh, F. R., Gabriel Rothman, S. L., & Sze, G. K. (2014). Lumbar disc nomenclature: Version 2.0. The Spine Journal, 14(11), 2525-2545.

Fehlings, M. G., Tetreault, L. A., Riew, K. D., et al. (2017). A clinical practice guideline for the management of patients with degenerative cervical myelopathy. Global Spine Journal, 7(3 Suppl), 70S-83S.

Gardner, A., Gardner, E., & Morley, T. (2011). Cauda equina syndrome: A review of the current clinical and medico-legal position. European Spine Journal, 20(5), 690-697.

Iyer, S., & Kim, H. J. (2016). Cervical radiculopathy. Current Reviews in Musculoskeletal Medicine, 9(3), 272-280.

Jensen, M. C., Brant-Zawadzki, M. N., Obuchowski, N., Modic, M. T., Malkasian, D., & Ross, J. S. (1994). Magnetic resonance imaging of the lumbar spine in people without back pain. New England Journal of Medicine, 331(2), 69-73.

Jensen, T. S., Karppinen, J., Sorensen, J. S., Niinimäki, J., & Leboeuf-Yde, C. (2008). Vertebral endplate signal changes, Modic change: A systematic literature review of prevalence and association with non-specific low back pain. European Spine Journal, 17(11), 1407-1422.

Kalichman, L., Kim, D. H., Li, L., Guermazi, A., Berkin, V., & Hunter, D. J. (2010). Computed tomography-evaluated features of spinal degeneration: Prevalence, intercorrelation, and association with self-reported low back pain. The Spine Journal, 10(3), 200-208.

Katz, J. N., & Harris, M. B. (2008). Lumbar spinal stenosis. New England Journal of Medicine, 358(8), 818-825.

Koslosky, E., & Gendelberg, D. (2020). Classification in Brief: The Meyerding Classification System of Spondylolisthesis. Clinical Orthopaedics and Related Research, 478(5), 1125-1130.

Kreiner, D. S., Hwang, S. W., Easa, J. E., et al. (2014). An evidence-based clinical guideline for the diagnosis and treatment of lumbar disc herniation with radiculopathy. The Spine Journal, 14(1), 180-191.

Lurie, J. D., Tosteson, A. N. A., Tosteson, T. D., et al. (2008). Reliability of readings of magnetic resonance imaging features of lumbar spinal stenosis. Spine, 33(14), 1605-1610.

Modic, M. T., Steinberg, P. M., Ross, J. S., Masaryk, T. J., & Carter, J. T. (1988). Degenerative disk disease: Assessment of changes in vertebral body marrow with MR imaging. Radiology, 166(1 Pt 1), 193-199.

North American Spine Society. (2011). Diagnosis and Treatment of Degenerative Lumbar Spinal Stenosis: Evidence-Based Clinical Guidelines for Multidisciplinary Spine Care. Burr Ridge, IL: North American Spine Society.

Pfirrmann, C. W. A., Metzdorf, A., Zanetti, M., Hodler, J., & Boos, N. (2001). Magnetic resonance classification of lumbar intervertebral disc degeneration. Spine, 26(17), 1873-1878.