MRI With or Without Contrast: A Patient's Guide to Understanding the Difference

Table of Contents

• Key Points
• Why This Topic Matters to Patients
• What Is MRI Contrast and How Does It Work?
• MRI Guidelines for the Head and Neck
• Understanding Brain and Skull Base Scans
• MRI Guidelines for the Spine
• MRI Guidelines for Muscles, Joints, and Extremities
• MRI Guidelines for the Pelvis and Sacrum
• MRI Guidelines for the Abdomen, Chest, and Female Pelvis
• What These Guidelines Mean for Your Care
• Limitations of These Guidelines
• Recommendations for Patients
• Frequently Asked Questions
• Source Information

Key Points

• Contrast is not always necessary; many common conditions like back pain, joint injuries, and migraines are fully evaluated without it.
• Structural problems (discs, joints, fractures) rarely need contrast, while inflammatory, infectious, and tumor conditions usually benefit from it.
• Specialized MRI scans answer different questions: MRA for arteries, MRV for veins, MRCP for bile ducts, and arthrogram for joint tears.
• An arthrogram injects contrast directly into the joint space to reveal tears invisible on a routine MRI, such as labral tears.
• Before any MRI, tell your team about allergies, kidney disease, pregnancy, and implanted devices—this helps ensure your safety.

Why This Topic Matters to Patients

If your doctor has ordered an MRI (magnetic resonance imaging), you may have noticed paperwork mentioning "with contrast," "without contrast," or "without and with contrast." These distinctions are not arbitrary billing codes — they reflect careful medical decisions about what your doctor needs to see.

MRI is a powerful imaging technique that uses magnetic fields and radio waves to create detailed pictures of the inside of your body. Unlike X-rays or CT scans, MRI does not use ionizing radiation. However, sometimes the natural differences between tissues are not enough to make a clear diagnosis. In those cases, a contrast agent is injected into a vein to make certain structures stand out more vividly.

This article translates a clinical reference sheet used by an MRI scheduling department. It outlines which scan type is appropriate for dozens of specific symptoms and conditions, from memory loss to back pain to suspected tumors. Knowing these guidelines can help you ask informed questions and understand why your particular scan is being ordered.

What Is MRI Contrast and How Does It Work?

MRI contrast material is typically a substance containing gadolinium, a rare-earth metal that has magnetic properties. When injected intravenously (into a vein), it circulates through your bloodstream and briefly accumulates in areas of the body where blood vessels are more abundant or where the blood-brain barrier has been disrupted.

On the resulting images, these areas appear brighter or "enhanced." This enhancement helps radiologists distinguish between normal tissue and areas affected by infection, inflammation, tumors, or abnormal blood flow.

There are three main types of MRI protocols described in this reference sheet:

• MRI without contrast: No injection is given. This is used when anatomy alone provides enough information, such as in evaluating a herniated disc or routine joint pain.
• MRI without and with contrast: You receive two sets of images — one before the injection and one after. Comparing the two reveals which areas "light up," helping characterize masses, infections, or inflammatory conditions.
• MRI with contrast only: This is less common and is used for specific situations like Gamma Knife surgical planning, where the target area must be clearly identified.

For certain specialized scans, the type of imaging itself changes too. MRA (magnetic resonance angiography) focuses on blood vessels, while MRV (magnetic resonance venography) focuses on veins. These are listed separately from regular brain or neck MRIs.

MRI Guidelines for the Head and Neck

The reference sheet divides brain and head-and-neck scans into several categories based on your symptoms or suspected condition. This is the largest and most detailed section of the original document, reflecting the complexity of the brain and surrounding structures.

MRI Brain Without Contrast (CPT Code 70551)

For conditions where standard anatomical detail is sufficient, an MRI of the brain is performed without contrast. This applies to patients experiencing:

• Alzheimer's disease, confusion, or dementia
• Headaches or migraines
• Memory loss
• Mental status changes
• Seizures
• Stroke, CVA (cerebrovascular accident), or TIA (transient ischemic attack)
• Trauma (such as a head injury)

Why no contrast for these cases? Conditions like Alzheimer's disease and migraines produce structural changes — such as shrinkage of brain tissue or white matter lesions — that are visible without the need for contrast enhancement. Strokes can often be identified on non-contrast images, and in the emergency setting, getting the scan done quickly without the time and risk of an IV injection can be advantageous.

MRI Brain Without and With Contrast (CPT Code 70553)

When there is a concern about a lesion, mass, infection, or demyelinating disease, the protocol changes to without and with contrast. This includes patients being evaluated for:

• Cranial nerve lesions
• Follow-up of a known lesion or mass (F/U Lesion/Mass)
• IAC (internal auditory canal) issues, hearing loss, tinnitus (ringing in the ears), or vertigo
• Infection
• Metastatic disease (cancer that has spread to the brain)
• Multiple sclerosis (MS)
• Neurofibromatosis (a genetic condition causing tumors on nerves)
• Pituitary gland conditions

Contrast enhances areas where the blood-brain barrier is damaged, which occurs in many tumors, in active MS plaques, and around infections. For example, in multiple sclerosis, contrast helps identify active inflammation versus older, healed lesions — information that directly affects treatment decisions.

MRI Brain With Contrast Only (CPT Code 70552)

Two specific situations call for a brain MRI with contrast only (no non-contrast series):

• Fiducial placement (small markers placed on the scalp for precise targeting during procedures)
• Gamma Knife planning (a form of highly precise stereotactic radiosurgery used to treat brain tumors and other abnormalities)

In both cases, the precise location of the target must be visualized with maximum clarity, and the patient is typically already known to have the lesion. The contrast-only scan avoids redundant imaging and saves time for patients undergoing these interventional procedures.

Understanding Brain and Skull Base Scans

MRA Head Without Contrast (CPT Code 70544) — Circle of Willis

For patients with stroke, CVA, TIA, or a suspected aneurysm (a bulging, weakened area in a blood vessel wall), doctors may order an MRA of the head focusing on the Circle of Willis — a ring of arteries at the base of the brain that supplies blood to the brain's two hemispheres. This scan is performed without contrast, since the movement of blood itself can be imaged using specialized MRI sequences.

This is reassuring for patients concerned about IV contrast: the major blood vessels of the brain can often be evaluated non-invasively and without any injection at all.

MRA Neck Without Contrast (CPT Code 70547)

Similarly, if you have experienced a stroke, CVA, or TIA and the concern is in the carotid arteries of the neck, an MRA of the neck without contrast is ordered. This can reveal narrowing (stenosis) or blockages that may have caused or could cause further events.

MRA Neck Without and With Contrast (CPT Code 70549)

When a Doppler ultrasound (a non-invasive test using sound waves) shows carotid stenosis greater than 60%, the protocol changes to an MRA of the neck without and with contrast. The contrast provides clearer detail of the degree of narrowing, which is critical for deciding whether surgery (such as carotid endarterectomy) or stenting is needed.

The 60% threshold is a well-established clinical benchmark — studies have shown that patients with stenosis above this level are at significantly higher risk of stroke and benefit from more aggressive intervention.

MRV Head Without and With Contrast (CPT Code 70546)

For suspected intracranial venous thrombosis (a blood clot in the veins of the brain) or evaluation of the venous sinuses (large channels that drain blood from the brain), an MRV of the head is performed with and without contrast. Venous clots can cause symptoms similar to stroke, such as headache, seizures, or neurological deficits, and this specialized scan is essential for diagnosis.

MRI Orbits/Face/Neck Without and With Contrast (CPT Code 70543)

The orbits (eye sockets), face, and neck share a common protocol when contrast is needed. Conditions that require this scan include:

• Optic neuritis (inflammation of the optic nerve, often associated with MS)
• Exophthalmos or proptosis (bulging of the eyes)
• Pseudotumor, mass, cancer, or metastases in the face or neck
• Vascular lesions (abnormal blood vessels)
• Visual disturbances
• Infection of the neck soft tissues
• Tumor or mass in the neck soft tissues
• Vocal cord paralysis

Contrast is crucial in the orbits because the optic nerve, surrounding muscles, and blood vessels are delicate structures where subtle enhancement can reveal inflammation, tumors, or conditions like thyroid eye disease.

MRI Guidelines for the Spine

Back and neck pain are among the most common reasons for MRI referrals. The spine is divided into three regions — cervical (neck), thoracic (mid-back), and lumbar (lower back) — and each has its own protocol.

Cervical Spine Without Contrast (CPT Code 72141)

An MRI of the cervical spine without contrast is ordered for common degenerative and structural problems:

• Degenerative disease (wear-and-tear changes like arthritis)
• Disc herniation (a "slipped disc" pressing on nerves)
• Extremity pain or weakness
• Neck pain
• Radiculopathy (nerve root compression causing shooting pain, numbness, or weakness)
• Trauma

These conditions involve structural changes — disc displacement, bone spurs, and nerve compression — that are visible without contrast. The natural cushion of the discs and the fat surrounding the nerve roots provide enough contrast on their own.

Cervical Spine Without and With Contrast (CPT Code 72156)

When infection or a mass is suspected, the cervical spine requires contrast:

• Discitis (infection of the intervertebral disc space)
• Mass or lesion
• Osteomyelitis (bone infection)

Infections and tumors cause inflammation that leads to increased blood flow and contrast enhancement. Without contrast, these conditions can be subtle or even invisible on early images. Delaying diagnosis of discitis or osteomyelitis can lead to serious complications, including permanent neurologic damage.

Thoracic Spine Without Contrast (CPT Code 72146)

The thoracic spine (mid-back) is evaluated without contrast for:

• Back pain
• Compression fracture (a collapsed vertebra, often due to osteoporosis)
• Disc herniation
• Radiculopathy
• Trauma

Like the cervical spine, these structural problems are well seen on non-contrast images.

Thoracic Spine Without and With Contrast (CPT Code 72157)

Contrast is added when the clinical concern is:

• Discitis
• Mass or lesion
• Osteomyelitis

If you are having fever, severe back pain, and a history of recent infection or surgery, your doctor may suspect a spinal infection — and this contrast protocol is the appropriate choice.

Lumbar Spine Without Contrast (CPT Code 72148)

The lumbar spine (lower back) is the most commonly imaged spinal region. Non-contrast MRI is appropriate for:

• Back pain
• Compression fracture
• Disc herniation
• Radiculopathy (commonly felt as sciatica — pain radiating down the leg)
• Stenosis (narrowing of the spinal canal)
• Trauma

The vast majority of lower back pain is caused by degenerative changes, herniated discs, or spinal stenosis — all of which are exquisitely demonstrated on non-contrast MRI.

Lumbar Spine Without and With Contrast (CPT Code 72158)

Contrast is added for the lumbar spine in these situations:

• Discitis
• Mass or lesion
• Osteomyelitis
• Post-lumbar surgery, if the surgery was performed less than 10 years ago

The post-surgical patient is an important special case. After back surgery, scar tissue and recurrent disc herniations can look similar on non-contrast images. With contrast, scar tissue typically enhances, while recurrent disc herniations do not. This distinction is critical in deciding whether a patient needs further surgery.

MRI Guidelines for Muscles, Joints, and Extremities

Musculoskeletal (MSK) MRI covers the arms, legs, hands, and feet. These scans are divided into two main categories: non-joint (imaging the shaft of the bone and surrounding soft tissues) and joint (imaging the joint structures like cartilage, ligaments, and menisci). Each has different CPT codes for upper and lower extremities.

Non-Joint MRI Without Contrast (Upper Extremity CPT 73218, Lower Extremity CPT 73718)

For injuries or conditions affecting the non-joint portions of the arms and legs, including the forearm, hand/finger, humerus (upper arm bone), foot/toes, lower leg, and thigh, a non-contrast MRI is used when the concern is:

• Fracture or stress fracture
• Muscle or tendon tear

Bone bruises, stress fractures, and muscle tears have characteristic appearances on MRI that do not require contrast. This protocol is common for athletes and people with overuse injuries.

Non-Joint MRI Without and With Contrast (Upper Extremity CPT 73220, Lower Extremity CPT 73720)

When a soft tissue problem that involves abnormal blood flow or inflammation is suspected, contrast is added. This scan is used when there is concern for a venous injection protocol to evaluate:

• Abscess (a pocket of infection)
• Cellulitis (a skin and soft tissue infection)
• Morton's neuroma (a benign nerve growth in the foot)
• Osteomyelitis (bone infection)
• Soft tissue tumor or mass
• Ulcer

For example, a diabetic patient with a non-healing foot ulcer may need this scan to determine whether the underlying bone is infected. Contrast enhancement in the bone marrow would confirm osteomyelitis and guide the need for long-term antibiotics or surgery.

Joint MRI Without Contrast (Upper Extremity CPT 73221, Lower Extremity CPT 73721)

Joint MRIs for the elbow, shoulder, wrist, ankle, hip, and knee are routinely performed without contrast for common joint problems:

• Arthritis
• Cartilage tear
• Fracture or stress fracture
• Internal derangement (a catch-all term for internal joint injury)
• Joint pain
• Ligament tear
• Meniscal tear (the "shock-absorber" cartilage in the knee)
• Muscle or tendon tear

This is excellent news for patients with knee or shoulder pain — the vast majority of joint injuries are fully evaluated without any IV injection. A shoulder MRI for rotator cuff tear or a knee MRI for ACL injury or meniscal tear does not require contrast.

Joint MRI Without and With Contrast (Upper Extremity CPT 73223, Lower Extremity CPT 73723)

When there is concern for infection or tumor within or around a joint, the protocol changes to include contrast:

• Abscess
• Cellulitis
• Osteomyelitis
• Tumor or mass
• Ulcer

The injection is given intravenously (through a vein), not into the joint itself. This is distinct from an arthrogram, described below.

Joint MRI With Contrast (Arthrogram) — Upper Extremity CPT 73222, Lower Extremity CPT 73722

An arthrogram is a specialized study where contrast material is injected directly into the joint space (intra-articular injection) rather than into a vein. This is used when there is a suspected tear that is difficult to see on a routine MRI — for example, a labral tear in the shoulder or hip, or certain types of cartilage injuries. The contrast outlines the internal structures of the joint, revealing tears that may be invisible otherwise.

• Pain or discomfort at the injection site is expected and temporary
• The entire scan typically takes longer than a routine MRI
• Not all joints require arthrograms — your orthopedist will recommend this if needed

MRI Guidelines for the Pelvis and Sacrum

The MSK section also includes dedicated scans of the pelvis, sacrum (the triangular bone at the base of the spine), coccyx (tailbone), and sacroiliac (SI) joints.

Pelvis MRI Without Contrast (CPT Code 72195)

Non-contrast pelvic MRI is appropriate for musculoskeletal concerns:

• Muscle or tendon tear
• Pelvic pain (when the source is suspected to be musculoskeletal)
• Sacrum or coccyx conditions
• SI joint problems (a common source of lower back and buttock pain)

SI joint dysfunction and sacral injuries are well-imaged without contrast, making this a straightforward test for these conditions.

Pelvis MRI Without and With Contrast (CPT Code 72197)

Contrast is added when the concern is:

• Abscess or ulcer
• Osteomyelitis

These infectious and inflammatory conditions benefit from the enhanced visibility provided by contrast, allowing the radiologist to distinguish active infection from surrounding inflammation.

MRI Guidelines for the Abdomen, Chest, and Female Pelvis

The final section of the reference sheet covers the internal organs of the abdomen and chest, plus the female reproductive organs.

Abdomen — MRCP and Adrenals Without Contrast (CPT 74181)

An MRCP (magnetic resonance cholangiopancreatography) is a specialized MRI that images the bile ducts, gallbladder, and pancreatic duct — the "plumbing" of the digestive system. It is performed without contrast and is used to evaluate gallstones, bile duct blockages, and pancreatic abnormalities. The adrenals (small hormone-producing glands above the kidneys) can also be evaluated without contrast in many cases.

Abdomen — Kidneys, Liver, Mass Evaluation Without and With Contrast (CPT 74183)

When evaluating the solid organs of the abdomen, contrast is essential:

• Kidneys
• Liver
• Mass (any suspicious growth)
• MRE (magnetic resonance enterography, which images the small intestine in detail)

Liver lesions, for example, have characteristic enhancement patterns that help radiologists determine whether they are benign (like hemangiomas) or malignant. Without contrast, this characterization is largely impossible.

Abdomen — MRA Without and With Contrast (CPT 74185)

MRA of the abdomen is used to evaluate the blood vessels, specifically the renal arteries (which supply the kidneys) and to assess mesenteric ischemia (reduced blood flow to the intestines, causing severe abdominal pain after eating). Contrast improves the visibility of these vessels and any blockages.

Chest — Brachial Plexus Neuropathy Without Contrast (CPT 71550)

The brachial plexus is a network of nerves that runs from the spinal cord in the neck through the shoulder and into the arm. For suspected brachial plexus neuropathy (nerve damage causing arm weakness, numbness, or pain), an MRI of the chest without contrast is the protocol of choice.

Chest — MRA of the Thoracic Aorta Without and With Contrast (CPT 71555)

The thoracic aorta is the great artery that carries blood from the heart through the chest. An MRA of the chest is performed with contrast to evaluate:

• Thoracic aortic conditions (such as aneurysm or dissection)
• Vascular anomalies (abnormal blood vessel formations)
• Subclavian vessel problems (the arteries that supply the arms)

Chest — Mediastinum Without Contrast (CPT 71550)

For non-vascular chest concerns, a non-contrast chest MRI evaluates the mediastinum (the space between the lungs that contains the heart, trachea, esophagus, and lymph nodes). This is used for:

• Hilar or mediastinal adenopathy (enlarged lymph nodes in the central chest)
• AC joint pain (acromioclavicular joint — where the collarbone meets the shoulder blade)
• SC joint pain (sternoclavicular joint — where the collarbone meets the breastbone)
• Scapula (shoulder blade) conditions
• Sternum (breastbone) conditions

Chest — Mediastinum Without and With Contrast (CPT 71552)

Contrast is added for more serious concerns within the chest:

• Infection
• Mass
• Metastatic disease (cancer that has spread into the chest)

Pelvis — Female Without Contrast (CPT 72195)

For common gynecologic conditions, a non-contrast pelvic MRI is often sufficient:

• Adenomyosis (when the uterine lining grows into the uterine muscle)
• Endometriomas (ovarian cysts filled with old blood, associated with endometriosis)
• Menses problems (abnormal menstrual bleeding)
• Pelvic pain
• Uterine anomalies (congenital abnormalities of uterine shape)

These conditions have characteristic appearances on standard MRI, and the structural detail provided by high-resolution imaging is typically enough without contrast.

Pelvis — Female Without and With Contrast (CPT 72197)

Contrast is added when a mass or malignancy is suspected:

• Adnexal mass (a mass near the ovary or fallopian tube)
• Endometrial cancer (cancer of the uterine lining)
• Known fibroids (benign uterine tumors — contrast helps plan treatment)
• Ovarian cancer
• Ovarian cysts (to characterize whether they are simple or complex)
• Pre-embolization work-up (before a procedure that blocks blood flow to fibroids)
• Uterine artery embolus (evaluating blood flow to the uterus)

For example, before a uterine artery embolization procedure — a minimally invasive treatment for fibroids — contrast MRI helps map the blood supply and confirm which fibroids are causing symptoms.

What These Guidelines Mean for Your Care

The most important takeaway from this reference sheet is simple: contrast is not always necessary. Many common conditions — including most back pain, joint injuries, migraines, and strokes — are thoroughly evaluated without any injection. When contrast is used, it is because the clinical question cannot be answered otherwise.

This distinction matters for several reasons:

• Patient safety: Although gadolinium contrast is generally safe, it carries a small risk of allergic reaction and, in patients with severe kidney disease, a rare but serious complication called nephrogenic systemic fibrosis (NSF). Avoiding unnecessary contrast reduces these risks.
• Cost and time: A contrast study takes longer (because images are acquired before and after injection) and costs more. Avoiding unnecessary contrast saves healthcare resources.
• Diagnostic accuracy: Using the wrong protocol can lead to missed diagnoses or the need to repeat the scan. These guidelines are designed to match the right scan to the right condition the first time.

For patients with conditions such as multiple sclerosis, suspected brain tumors, or spinal infections, the contrast portion of the scan is not optional — it is the part that provides the diagnostic information needed. The "without and with" approach ensures that subtle findings are not missed.

The reference sheet also underscores the value of specialized sequences. An MRA for stroke, an MRV for venous clot, an MRCP for bile duct stones, and an arthrogram for joint tears are all MRI-based, but they answer very different clinical questions. When your doctor orders one of these, they are following protocols refined over years of radiology practice.

Limitations of These Guidelines

This reference sheet is exactly what its title states: a reference for scheduling and pre-certification. It is not a substitute for individualized medical judgment. Several important limitations should be acknowledged:

• Individual variation: Your doctor may order a different protocol based on your specific history, physical examination, prior imaging results, or other factors. For example, a patient with a known allergy to gadolinium might have a modified study or a different imaging test altogether.
• Not all conditions are listed: The sheet covers common scenarios but not every possible indication for an MRI. Rare conditions, unusual presentations, and complex cases may require protocols not listed here.
• Local practice variations: Different imaging centers and radiology practices may have their own protocols, and insurance companies may have pre-authorization requirements that differ from this chart.
• Device and technique differences: The quality of contrast enhancement depends on the MRI scanner, the specific contrast agent used, the dose, and the timing of image acquisition. This sheet does not address these technical variables.
• CT codes are for billing: The CPT (Current Procedural Terminology) codes shown are billing codes. Your actual experience at the imaging center — scan duration, preparation, and aftercare — may vary.

Most importantly, this document does not tell you whether you need an MRI at all. That decision is made by your physician based on your symptoms, exam findings, response to treatment, and other diagnostic tests. An MRI is a powerful tool, but it is not always the right first step.

Recommendations for Patients

If your doctor has ordered an MRI, here is how you can use this information to be an informed patient:

1. Ask what type of scan you are having. Your doctor's office can tell you whether your scan will be with contrast, without contrast, or both. Ask why that particular protocol was chosen — a good physician will be happy to explain.
2. Check the MRI order form. Ensure the reason for the exam listed on your order matches your actual symptoms. If you are having a brain MRI for memory loss, the order should say "memory loss" — this helps the radiologist tailor the study appropriately.
3. Inform the radiology team of:
   • Any allergies, especially to contrast material, iodine, or latex
   • Kidney disease or diabetes (which can affect kidney function)
   • Pregnancy or the possibility of being pregnant
   • Any implanted devices (pacemakers, cochlear implants, aneurysm clips, etc.)
   • Whether you have had prior surgery (especially back surgery within the last 10 years, which may change the protocol)
4. Arrive prepared for either scenario. Even if your order says "without contrast," the radiologist may decide during the scan that contrast is needed — for example, if an unexpected finding appears on the non-contrast images. This is not an error; it is appropriate clinical judgment.
5. If you are having contrast: The injection is usually given into a vein in your arm or hand. You may feel a cool sensation as the contrast circulates. Let the technologist know if you feel pain, shortness of breath, or any unusual symptoms during the injection.
6. If you are worried about the contrast: Speak up before your scan. Your doctor can discuss the benefits and risks in your specific case. In most situations, the benefit of an accurate diagnosis far outweighs the small risks of contrast.
7. Now you can spot the pattern: In general, structural problems (discs, joints, fractures, routine headaches) rarely need contrast, while inflammatory, infectious, and neoplastic (tumor) problems usually benefit from it. The more the suspected problem involves abnormal blood vessel activity, the more likely the protocol will include contrast.
8. Bring your imaging to your doctor. After your MRI, you will typically receive a copy of the images on a CD or digital access. Bring this to your follow-up appointment. Many practices also use image-sharing networks that automatically transmit the images to your referring physician.

The reference sheet also highlights the importance of proper scan selection for follow-up examinations. If you are being monitored for a known condition — such as a brain lesion, a liver mass, or an aneurysm — the protocol described here ensures that your new scan can be directly compared with your previous one. Changes in lesion size, enhancement characteristics, or blood vessel dimensions can then be detected with confidence.

Finally, be prepared for pre-certification. Your doctor's office will often need to obtain insurance approval before your scan, and the CPT codes in this document are part of that process. If your insurance denies a scan, it may be because the protocol does not match the listed reason for the exam. Bringing these guidelines to your doctor's attention can help resolve such issues.

Frequently Asked Questions

What is MRI contrast and why is it used?

MRI contrast is a substance containing gadolinium, injected into a vein. It circulates in your bloodstream and briefly collects in areas with more blood vessels or where the blood-brain barrier is damaged. On images, these areas appear brighter, helping radiologists tell normal tissue from infection, inflammation, tumors, or abnormal blood flow.

Why does my MRI order say 'without and with contrast'?

This means you receive two sets of images: one before the injection and one after. Comparing them reveals which areas 'light up' with contrast. This helps characterize masses, infections, inflammatory conditions, or active MS plaques. Your doctor needs this comparison to make an accurate diagnosis or guide treatment decisions.

Will I need contrast for a brain MRI for headaches or memory loss?

Usually no. For conditions like headaches, migraines, memory loss, seizures, stroke, or trauma, a brain MRI without contrast is standard. These problems cause structural changes visible without injection. Contrast is added when there is concern for a mass, infection, multiple sclerosis, or other conditions that affect the blood-brain barrier.

Is MRI contrast safe? What risks should I know about?

Gadolinium contrast is generally safe, but it carries a small risk of allergic reaction. In patients with severe kidney disease, there is a rare but serious risk of nephrogenic systemic fibrosis (NSF). Tell your radiology team about any allergies, kidney disease, diabetes, or pregnancy before your scan.

What is an arthrogram and how is it different from a regular MRI?

An arthrogram is a specialized MRI where contrast is injected directly into the joint space, not into a vein. It is used when a routine MRI may miss a tear, such as a labral tear in the shoulder or hip. The injection site may be sore temporarily, and the scan typically takes longer.

Why doesn't my back pain MRI need contrast?

Most back pain is caused by degenerative changes, disc herniation, or spinal stenosis—structural problems clearly visible without contrast. The natural cushion of discs and fat around nerve roots provide enough contrast on their own. Contrast is added when infection or a mass is suspected, such as discitis or osteomyelitis.

What should I do before my MRI to prepare?

Check that the reason on your MRI order matches your symptoms. Inform the radiology team about allergies, kidney disease, diabetes, pregnancy, implanted devices, and any prior surgery—especially back surgery within 10 years. Ask your doctor why this particular protocol was chosen. Even if your order says 'without contrast,' the radiologist may decide contrast is needed during the scan.

When should I get a second opinion on whether my MRI should be done with or without contrast?

MRI contrast is not always necessary. Structural problems such as a herniated disc, routine joint pain, or uncomplicated headache are usually evaluated without contrast. If infection, tumor, multiple sclerosis, or spinal infection is suspected, a without-and-with contrast study is typically needed. Because individual history, prior imaging, allergies, and kidney function can change the appropriate protocol, a second opinion can confirm whether the ordered scan matches your specific situation. Bring your MRI order, images and report, allergy list, kidney function results, and surgery history. Diagnostic Detectives Network provides independent expert second opinions.

Source Information

Original Article Title: Contrast-vs.-No-Contrast MRI

Author/Organization: MRI Group (an imaging center serving the central Pennsylvania region)

Original Document Date: 6/14 (June 2014) — a clinical reference sheet used for scheduling and pre-certification of MRI examinations

Publication Details: The original is a procedural reference document, not a peer-reviewed research paper. It was designed for use by radiologists, scheduling staff, and referring physicians to determine the correct MRI protocol and CPT code for a given clinical indication. Contact information in the original: Scheduling line 717.291.1016 or 888.MRI.1377; Fax 717.509.8642; Web Site www.MRIGroup.com.

Note: This patient-friendly article is based on clinical reference material used in medical imaging practice. All CPT codes, clinical indications, and contrast protocol recommendations have been preserved from the original document. For personalized medical advice, please consult your physician or radiologist.