Magnetic Resonance Angiography, Aortic Arch — With Intravenous Contrast
An MRI angiogram of the aortic arch uses intravenous contrast and magnetic resonance images to evaluate the aorta's anatomy and blood flow.
["This test uses MRI and IV contrast to examine the aortic arch, the curved portion of the main artery leaving the heart."]
Key facts at a glance
- LOINC
- 105142-4
- Short code
- MRA Ao arch W contr IV
- Synonyms
- MRA Ao arch W contr IV
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- mr-angio
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
Magnetic resonance angiography, or MRA, creates detailed images of blood vessels without using X-rays. This version focuses on the aortic arch and includes intravenous contrast material to help show the vessel and surrounding structures clearly.
Why might I need this test?
Your clinician may order this test to evaluate the aortic arch when there are concerns about an aneurysm, narrowing, an abnormal vessel shape, or another aortic condition. It may also help assess blood flow through the region or plan treatment.
How is the test performed?
You will lie on a table inside an MRI scanner while images are taken. An IV line may be placed in your arm or hand to administer contrast, and you may be asked to hold your breath briefly during image acquisition.
How do I prepare for the test?
Follow the imaging center's instructions about eating, drinking, and medications. Tell the care team if you have kidney disease, have previously reacted to contrast, are pregnant or may be pregnant, have a pacemaker or other implanted device, or experience claustrophobia. Some implants or objects may not be safe near the MRI scanner.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal findings may indicate narrowing, an aneurysm, an abnormal connection or vessel shape, or another problem involving the aortic arch. Results should be interpreted by a radiologist in the context of your symptoms, examination, and other tests. If you have sudden severe chest or back pain, shortness of breath, fainting, or other acute symptoms, seek urgent medical care rather than waiting for this test.
Short name
Aortic arch MR angiography with IV contrast
Frequently asked questions
Does this test use radiation?
What is the difference between MRA and a routine MRI?
Is the IV contrast material safe?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
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 16, 2026. · Read our editorial policy