MRI Sialography
What is this procedure?
MRI sialography is a special type of MRI scan used to look at the salivary glands and their ducts without needing to inject contrast dye into the duct. It uses strong magnetic fields and radio waves to create detailed images of the ducts and surrounding structures.
Why is it done?
MRI sialography is helpful for:
- Situations where duct cannulation is not possible or too uncomfortable – e.g., very narrow or scarred ducts.
- Troubleshooting complex salivary problems – especially when other tests (ultrasound, CT, conventional sialography) are inconclusive.
- Investigating recurrent swelling, suspected ductal narrowing, mucus plugs, or subtle stones.
- Assessing the gland in people who cannot have X-ray contrast injected.
What happens during the procedure?
- You will lie on an MRI scanning bed.
- The area around your head and neck will be positioned comfortably.
- No needles or injections are usually required.
- The scanner makes loud tapping noises; ear protection is provided.
- You will need to lie still while the images are taken.
- The scan typically takes 15–30 minutes.
After the procedure
- You can go home immediately.
- There are no restrictions on eating, drinking, or activity.
- Your doctor will receive the images and review the results with you later.
Benefits
- Completely non-invasive
- No radiation
- No contrast injection into the duct
- Very good for assessing ductal shape and gland structure
- Useful when conventional sialography cannot be performed
Possible risks
MRI sialography is very safe. Risks are minimal but include:
- Discomfort from lying still
- Claustrophobia in the scanner (tell the team if this concerns you)
- Rare issues related to metal implants or devices (the team will check this beforehand)
Follow-up
Your doctor will review the results and discuss whether any further tests or treatments are needed.
