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Magnetic Resonance Imaging (MRI) of the Left Breast Without Contrast

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

A left breast MRI creates detailed images without injecting contrast dye, helping evaluate breast tissue, abnormalities, and sometimes breast implants.

Quick summary

["This scan provides detailed images of the left breast without radiation or injected contrast dye."]

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

Key facts at a glance

LOINC
36438-0
Short code
MR Brst-L WO contr
Synonyms
MR Brst-L 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
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?

Breast MRI uses a strong magnetic field and radio waves to create detailed pictures of breast tissue. This version images the left breast and does not use injected contrast dye.

Why might I need this test?

A breast MRI may be used to investigate a breast lump or other suspicious finding, assess the extent of a known breast problem, examine certain high-risk situations, or evaluate breast implants. Your clinician will explain the specific reason for the scan.

How is the test performed?

You will lie on a padded table inside the MRI scanner while the machine takes images from several angles. The scan may be somewhat noisy, but it is generally painless. A scan without contrast does not involve an injection, although additional imaging with contrast may be needed if the initial images require further evaluation.

How do I prepare for the test?

Remove jewelry, watches, hairpins, and other metal items before entering the scanner area. Tell the imaging staff about any implants, heart devices, or metal in your body. If you might be pregnant, notify the staff before the examination.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

MRI findings may show no significant abnormality, reveal a benign-appearing finding, or identify an area that needs additional evaluation. If suspicious tissue is detected, the results may guide further imaging, biopsy, or specialist follow-up. Implant-related problems can also be assessed when appropriate.

Short name

Left breast MRI without contrast

Frequently asked questions

Does this MRI use radiation or contrast dye?
No. MRI does not use ionizing radiation, and this examination is specified as being performed without injected contrast dye.
Is a breast MRI painful?
The scan is usually not painful, although the confined space and loud scanner noises may feel uncomfortable. Tell the staff if you are anxious or have trouble lying still.
Why was only the left breast listed?
The order specifies imaging of the left breast, which may be appropriate for a left-sided finding, implant evaluation, or a particular clinical reason. Ask the imaging center or ordering clinician if you are unsure whether additional imaging is planned.
  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