An MRI of the brain is a scan that uses a strong magnetic field and radio waves to create detailed images without ionizing radiation. Doctors use it to investigate symptoms, look for changes in brain tissue, and monitor certain neurological conditions.
If your doctor has recommended a brain MRI, understanding the examination can help you feel more prepared. Below, we explain what the scan can show, when contrast may be needed, how to prepare, and what happens during and after your appointment.
What Is a Brain MRI?
A brain MRI, also called a head MRI, creates detailed images that help doctors examine the brain and surrounding structures. A radiologist reviews these images for changes that may help explain symptoms or assess a known condition.
MRI findings are interpreted alongside your medical history, physical examination, and other test results. The scan can provide valuable information, but it does not diagnose every neurological condition on its own.
What Does an MRI of the Brain Show?
A brain MRI can help doctors identify or monitor several types of changes. What the examination shows depends on the reason for the scan and the imaging sequences used.
- Brain tumors and other masses: MRI can help show a mass’s location, size, and relationship to nearby structures. Further tests may be needed to establish the diagnosis.
- Stroke-related changes: MRI can reveal areas of brain injury associated with a stroke.
- Multiple sclerosis: MRI can identify lesions that support the assessment and monitoring of MS. Doctors interpret these findings alongside other clinical information.
- Structural causes of seizures: MRI may reveal abnormalities associated with seizures, although some people with epilepsy have normal MRI findings.
- Infection or inflammation: Certain patterns can help doctors investigate infection, inflammation, or swelling.
- Fluid buildup and pituitary abnormalities: MRI can help assess enlarged fluid spaces in the brain and certain pituitary conditions. Some concerns require a dedicated scanning protocol.
A normal brain MRI does not rule out every cause of neurological symptoms. Your doctor will explain what the results mean in your situation.
How Does a Brain MRI Work?
An MRI scanner uses a strong magnetic field and radio waves to produce signals from your body. A computer turns these signals into detailed images of the brain.
Some clinical questions require specialized examinations. MR angiography, or MRA, examines blood vessels, while functional MRI can help map areas involved in tasks such as movement or speech. These are not automatically included in every routine brain MRI.
What To Expect During a Brain MRI
If this will be your first brain MRI, you may wonder what to expect during the procedure. First, rest assured that MRI is painless. The scan does not involve ionizing radiation, so you will not be exposed to radioactivity, either.
Here’s what to expect when you arrive for your scan:
- The provider will ask you to remove anything metal, such as jewelry or a belt. Metal objects can derail the results as the MRI scanner uses magnets.
- Next, you’ll lay on a table and get comfortable. The technician will insert earphones into your ears to block out the sound from the scanner, which can be quite loud.
- The operator will place coils around your head to capture radio waves and enhance the image quality from the brain scan.
- The table will move you into the MRI scanning machine, which looks like a large tube. If you aren’t comfortable with enclosed, tight spaces, you can instead opt for an open MRI that allows you to see your surroundings.
- The operator will leave the room and watch as your scan progresses on the monitor. Try to stay as still as possible during the scan for accurate results.
That’s the end of your open MRI. Brooklyn operators will then send the results to your doctor for review. Your medical provider can follow up with you about your next steps.
Brain MRI With and Without Contrast
Some brain MRI examinations use an intravenous contrast agent, usually containing gadolinium, to make certain abnormalities easier to see. Other examinations can provide the information your doctor needs without contrast.
The decision depends on the reason for the scan and the recommended imaging protocol. Contrast is not necessary for every patient.
Before your appointment, tell the imaging team about kidney disease, previous reactions to MRI contrast, and any possibility of pregnancy. The team will review this information and explain any additional instructions.
Can You Have an Open MRI for a Brain Scan?
An open MRI may help some patients who feel anxious in enclosed spaces. However, the appropriate scanner depends on the examination your doctor has requested and the images needed.
Patients must remain still during both open and closed MRI examinations. Having a lower-strength magnet does not automatically make a scanner suitable for someone with an implant; the team must check the specific device and its approved scanning conditions.
If you are concerned about claustrophobia, contact us before booking. We can discuss our open MRI services and help confirm the appropriate arrangements for your prescribed examination.
What Happens After a Brain MRI?
A radiologist reviews the images and sends a report to the clinician who ordered your examination. Your clinician will explain the findings in the context of your symptoms and medical history.
An abnormal finding does not always mean a serious condition, and a normal scan does not explain every neurological symptom. Depending on the results, your doctor may recommend monitoring, additional tests, or treatment. Ask the imaging team when your report is expected and how it will reach your referring clinician.
Arrange Your Brain MRI in Brooklyn
Has your doctor recommended a brain MRI? Contact City Wide Radiology to discuss your imaging order, confirm the appropriate examination, and ask about preparation and appointment availability.
Call 718-236-6800 or request an appointment. You can also review our accepted insurance plans and ask our team about coverage verification and any authorization requirements.
FAQs
Have further questions? Learn more about brain MRI scans here.
Does an Abnormal Brain MRI Always Mean Something Serious?
No. Some findings may be incidental or may only need monitoring. Others require further assessment. Your doctor will explain the significance of the finding and whether additional imaging, tests, or treatment are needed.
Do You Need a Brain MRI After a Car Accident?
Not everyone needs a brain MRI after a car accident. A clinician should assess your symptoms and injury before deciding whether imaging is needed and which test is appropriate. CT may be used during an urgent assessment, while MRI may help investigate selected injuries. Seek immediate medical attention for confusion, worsening headache, repeated vomiting, weakness, or loss of consciousness after a head injury.
Can Brain MRIs Find Tumors?
Yes. Brain MRI can help detect tumors and show their size, location, and effect on surrounding structures. Contrast may be used to provide additional information. MRI alone does not always establish the exact tumor type, so further evaluation may be necessary.
How Long Does a Brain MRI Take?
A brain MRI often takes around 30 to 60 minutes, although the timing depends on the scanning protocol and whether additional images are needed. Your full appointment may take longer because of screening, preparation, or IV placement. Ask the imaging team how much time to allow for your specific examination.
Is a Brain MRI Painful?
The scan itself is usually painless. You may feel uncomfortable lying still, and an IV needle can cause brief discomfort if contrast is needed. Tell the team before your appointment if you have pain, anxiety, or claustrophobia so they can discuss suitable arrangements.