Skip to content

Magnetic Resonance Angiography (MRA), Chest Vessels, With or Without Intravenous Contrast

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

Chest MRA is an MRI-based imaging test that shows blood vessels in the chest. It may be performed with or without intravenous contrast.

Quick summary

["This test images chest blood vessels to help evaluate their shape, blood flow, and possible narrowing or other abnormalities."]

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

Key facts at a glance

LOINC
36420-8
Short code
MRA Chest ves WO+W contr IV
Synonyms
MRA Chest ves WO+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, is a type of MRI that produces detailed images of blood vessels. For the chest, it may evaluate vessels such as the aorta and major branches or the pulmonary vessels.

Why might I need this test?

A chest MRA may be ordered to investigate suspected narrowing, blockage, aneurysm, dissection, or an abnormal vessel formation. It may also be used for planning, follow-up, or preoperative evaluation.

How is the test performed?

You lie on a table inside an MRI scanner while the machine creates images. If contrast is used, it is given through an intravenous line; the scan may include images before and after contrast is administered.

How do I prepare for the test?

Follow the instructions provided by the imaging center, especially if contrast may be used. Tell the care team about metal implants, claustrophobia, pregnancy, kidney problems, or any prior contrast reaction; fasting requirements vary by protocol.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate narrowing, obstruction, aneurysm, dissection, or another abnormality involving a chest blood vessel. The significance depends on which vessels were examined and the symptoms and medical history. A radiologist should interpret the images in the context of the full examination.

Short name

Chest vessel MRA

Frequently asked questions

Is chest MRA the same as a standard chest MRI?
No. MRA is a focused MRI technique that emphasizes blood vessels and blood flow, often using a scan called angiography.
Why might I need intravenous contrast?
Contrast may help make vessels and their connections clearer. The care team will decide whether contrast is appropriate based on the ordered protocol and your medical history.
Will I need to stay in the scanner for the entire MRA?
You will need to remain still during the imaging portions of the exam. The technologist will guide you and may communicate through a speaker or microphone.
  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