Skip to content

Magnetic Resonance Imaging (MRI) of the Paranasal Sinuses Without Contrast

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

A sinus MRI creates detailed images of the sinus cavities using magnetic fields and radio waves, without injected contrast material.

Quick summary

["This test evaluates the structure and tissues of the sinuses and does not require an IV contrast injection."]

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

Key facts at a glance

LOINC
30662-1
Short code
MR Sinuses WO contr
Synonyms
MR Sinuses 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?

This is an imaging test that creates detailed pictures of the air-filled spaces around the nose, called the paranasal sinuses. It uses a strong magnetic field and radio waves rather than ionizing radiation.

Why might I need this test?

A provider may order this test to evaluate persistent congestion, sinus pressure, facial pain, nasal drainage, or suspected inflammation. It can also help assess nasal polyps, sinus anatomy, and other structural or tissue abnormalities.

How is the test performed?

You will lie on a narrow table inside an MRI scanner and remain still while the images are taken. The scanner may make loud clicking or knocking sounds, and a technician will guide you throughout the procedure. No intravenous contrast is given.

How do I prepare for the test?

Fasting is usually not required, but you should follow the instructions provided by the imaging facility. Remove jewelry and other metal objects when directed, and tell the care team about implants, a pacemaker, pregnancy, or severe claustrophobia before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may include sinus inflammation, thickened lining, fluid, or nasal polyps. The images may also show structural narrowing or other tissue changes that need clinical follow-up. A radiologist will interpret the images, and your healthcare professional will explain the results in the context of your symptoms.

Short name

Sinus MRI without contrast

Frequently asked questions

Does this MRI use contrast material?
No. “Without contrast” means no intravenous contrast dye is injected during this examination.
Do I need to fast before a sinus MRI?
Usually not, but the imaging facility may provide specific instructions. Follow any preparation directions you receive before the appointment.
What if I have metal implants or feel confined in small spaces?
Tell the care team about any implants, devices, or claustrophobia before the test. The MRI team will review safety concerns and may provide instructions or options to make the scan more comfortable.
  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