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Magnetic Resonance Imaging (MRI) With or Without Contrast

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

An MRI creates detailed pictures using magnetic fields and radio waves. Your order may include an intravenous contrast agent to improve image clarity.

Quick summary

["This MRI may be performed with or without injected contrast, depending on the exact order."]

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

Key facts at a glance

LOINC
37287-0
Short code
MR TMJ-R WO contr
Synonyms
MR TMJ-R 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?

Magnetic resonance imaging, or MRI, uses magnetic fields and radio waves to create detailed pictures of the body. The order may include a contrast agent given through an intravenous line to make certain tissues easier to see.

Why might I need this test?

MRI may be used to evaluate soft tissues, bones, joints, the brain, spinal cord, organs, or blood vessels. Your clinician will choose it to investigate symptoms, monitor a condition, or plan treatment.

How is the test performed?

You will lie on a table that moves into a large magnet. The scanner makes loud knocking and clicking sounds, and you may be asked to hold still or change positions. If contrast is included, it is usually injected into a vein before the scan.

How do I prepare for the test?

Follow the imaging center's instructions because preparation varies by the body area being examined. Tell the staff about any implanted electronic devices, metal fragments, prior contrast reactions, kidney problems, or pregnancy before the appointment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

MRI findings may show conditions such as inflammation, infection, injury, narrowing or obstruction, cysts, or a mass. The meaning depends on the area examined and the reason for the scan, so the images should be interpreted by a radiologist and reviewed with your clinician.

Short name

MRI with or without contrast

Frequently asked questions

Will I receive contrast for this MRI?
The order includes the option of MRI with or without contrast, so administration may depend on the exact procedure and protocol. The imaging center will explain this before the scan.
Is an MRI painful?
MRI itself is generally painless. You must remain still inside the scanner, and an IV injection for contrast may cause brief discomfort.
Can I have an MRI if I have a pacemaker or other implant?
Many modern devices can be scanned safely, but the device type and MRI conditions must be checked. Give the imaging center a complete list of implants and medical conditions before your appointment.
  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