MRI of Cerebral - Aneurysm
This non-invasive imaging test uses magnetic fields and radio waves to capture detailed, high-resolution images of your brain tissue and the cerebral arteries that supply blood to your brain, with no exposure to ionizing radiation or injected contrast dye. It is designed to detect, evaluate, and monitor cerebral aneurysms, which are weakened, bulging areas in cerebral artery walls that carry a risk of life-threatening rupture if unaddressed. The 45-minute exam requires no special patient preparation, though it carries a high risk of triggering claustrophobia in patients with anxiety around enclosed spaces.
This 45-minute, radiation-free MRI scan creates detailed images of your brain and cerebral arteries to detect, assess, and monitor cerebral aneurysms without the use of contrast dye.
Key facts at a glance
- Modality
- mri
- Body part
- head · cerebral
- Ionizing radiation
- false
- Radiation dose
- 0
- Duration (min)
- 45
- Pregnancy safe
- true
- Pediatric safe
- false
- Breastfeeding safe
- true
- Claustrophobia risk
- high
- Metal implant safe
- conditional
- Sedation
- none
- LOINC
- 24590-2
- SNOMED
- 241615005
- Result turnaround
- 24-48h
- Availability
- routine
- Setting
- any
- Cost tier
- high
What Is a Cerebral Aneurysm MRI?
A cerebral aneurysm MRI is a safe, non-invasive imaging test that uses strong magnetic fields and radio wave pulses to generate detailed cross-sectional images of your brain and the cerebral arteries that carry oxygen-rich blood to your brain tissue. Unlike many other vascular imaging tests, this exam does not require injected contrast dye or expose you to harmful ionizing radiation, making it suitable for repeated use to track aneurysm changes over time and safe for patients with contrast allergies.
Clinical Uses for Nervous System Care
Your healthcare provider may order this MRI for a range of nervous system-related clinical purposes, including detecting previously undiagnosed cerebral aneurysms in patients with risk factors such as family history of aneurysms, certain genetic conditions, or a history of head trauma. It is also used to measure the size, shape, and exact anatomical location of known aneurysms, assess their risk of rupture, and monitor for slow growth or structural changes that may indicate a need for intervention such as surgical clipping, endovascular coiling, or other flow-diverting treatments. For patients who have already received treatment for a cerebral aneurysm, this exam can be used to check for aneurysm recurrence or complications related to prior procedures.
What to Expect During Your 45-Minute Exam
The full exam takes approximately 45 minutes to complete, during which you will lie flat on a narrow, motorized table that slides into a large, tube-shaped MRI machine. You will be asked to stay completely still for the duration of the scan to ensure clear, usable images, and you will hear loud rhythmic humming, thumping, or clicking noises as the machine captures images; you will be provided with earplugs or noise-canceling headphones to reduce discomfort from these sounds. Because this exam carries a high risk of triggering claustrophobia in patients with anxiety around enclosed spaces, notify your care team ahead of your appointment if you have a history of claustrophobia so they can discuss comfort options such as mild sedation or a friend or family member staying in the room with you during the scan.
How to Prepare for Your Scan
No special preparation is required for this non-contrast cerebral aneurysm MRI, and you may eat, drink, and take your regular prescribed medications as normal before your appointment. You will be asked to remove all metal objects, including jewelry, watches, eyeglasses, dentures, and electronic devices, before entering the MRI scanning room, as metal can interfere with the machine’s magnetic fields and pose a serious safety risk. Tell your provider ahead of time if you have any implanted medical devices such as pacemakers, metal aneurysm clips, cochlear implants, or joint replacements, as some devices are not safe for use near an MRI machine and may require alternative imaging planning.
How to read the report
- Results reviewed by radiologist.
What Is This Procedure?
This mri evaluates cerebral, specifically brain. No radiation exposure.
What Does It Show?
Detailed images of brain and cerebral arteries. Part of the nervous system.
Common Uses
This exam is commonly used to detect brain or spinal abnormalities, evaluate nerve compression, assess stroke, and diagnose degenerative conditions.
What to Expect
The procedure takes approximately 45 minutes. Inform your doctor if you experience claustrophobia.
Severe pain at procedure site
urgentWorsening severe pain with fever or other symptoms. Go to urgent care or ER.
Mild symptoms after procedure
promptMild discomfort or symptoms that don't improve. Contact your doctor.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy