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Magnetic Resonance Angiography, Chest Vessels, Without Contrast

Published: August 9, 2026Updated: August 16, 2026

A magnetic resonance angiography (MRA) test creates detailed images of blood vessels in the chest without using injected contrast dye.

Quick summary

["This test uses MRI to examine chest blood vessels and blood flow without intravenous contrast."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
36547-8
Short code
MRA Chest ves WO contr
Synonyms
MRA Chest ves WO contr
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 (MRA) is an imaging test that uses a strong magnetic field and radio waves to create detailed pictures of blood vessels. In this test, the vessels in the chest are examined without intravenous contrast dye.

Why might I need this test?

A chest MRA may be ordered to evaluate blood flow and look for narrowing, blockage, aneurysms, congenital abnormalities, or other changes in the major vessels of the chest. It may also help guide further evaluation or treatment.

How is the test performed?

You will lie on a table inside an MRI scanner while the machine takes a series of images. The scan may take 30 to 60 minutes, although timing varies. You may be asked to remain still, and the technician will communicate with you through a speaker or intercom.

How do I prepare for the test?

Follow your imaging center's instructions about eating, drinking, and medications. Remove jewelry, hearing aids, and other metal items before the scan, and tell the care team about implants, a history of claustrophobia, pregnancy, or any other health concerns. If sedation is planned, arrange transportation home as directed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate narrowing or obstruction of a chest blood vessel, an aneurysm, an abnormal vessel connection, or a congenital vascular condition. The results should be interpreted by a radiologist in the context of your symptoms, examination, and other tests.

Short name

Chest MRA without contrast

Frequently asked questions

Does this test use contrast dye?
No. This version of chest MRA is performed without intravenous contrast, although you may receive fluids by IV for access.
Is a chest MRA the same as a routine chest MRI?
Both use MRI technology, but MRA is focused specifically on blood vessels and blood flow. Your imaging order determines which type of study is performed.
Will I feel anything during the scan?
The MRI itself is generally painless, but the scanner is noisy and the enclosed space may feel uncomfortable or claustrophobic. Tell the care team if you have concerns about staying in the scanner.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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