Soft-tissue neck MRI protocols
A crowded anatomic highway of airway, great vessels and nerves. The constant enemy is the swallow reflex, which wipes out fat suppression and blurs resolution.
By the ScanFlo Editorial Team · Updated
In this section · Protocols
Neck imaging is a discipline in motion control. A swallow during acquisition renders a sequence non-diagnostic, so timing the sequences around the patient's swallowing, and saturating the structures that move, is the core skill. The clinical questions are usually nodal (reactive versus malignant), glandular, or the relationship of a mass to the carotid and airway.
Deep-dive protocol guides
Each study has its own step-by-step guide covering positioning, planning for every sequence, parameters, artifacts and a review checklist:
Studies in this region
- Lymphadenopathy / neck mass
- Squamous cell carcinoma staging
- Thyroid mass
- Parotid gland
- Submandibular gland
- MR sialography
- Brachial plexus
- Perineural spread
- Post-treatment neck
Planning
- Keep the neck neutral. Hyperextension stretches the platysma and adds motion; flexion collapses the airway.
- Place an anterior saturation band over the oral cavity and tongue to kill involuntary motion signal.
- Coach the patient to swallow only in the quiet gaps between sequences, never during acquisition.
- Cover the hard palate to the aortic arch, including Waldeyer's ring superiorly and the supraclavicular nodes inferiorly.
- Use flow compensation to stop carotid pulsation obscuring the jugular nodal chains.
Sequences by study
| Sequence | Typical use | Why |
|---|---|---|
| Axial T1 | Anatomy map | Nodes grey, fat white, so nodes stand out from fat |
| Axial T2 fat-sat | Pathology detector | Malignant nodes lose the fatty hilum and brighten |
| DWI (b≈800) | Nodal characterisation | Malignant cells restrict diffusion |
| T1 fat-sat + contrast | Mass and perineural spread | Enhancement and skull-base tracking |
| MR sialography | Salivary ducts | Heavily T2-weighted; stones and strictures without contrast |
Mistakes that cost repeats
- Swallowing during acquisition, the single commonest cause of a non-diagnostic neck study.
- Hyperextending the neck and adding platysmal motion.
- Carotid pulsation ghosting across the jugular nodes without flow compensation.
- Insufficient superior or inferior coverage, clipping Waldeyer's ring or the supraclavicular nodes.
Common questions
- Why is swallowing such a problem in neck MRI?
- The oesophagus and larynx sit millimetres from the target anatomy. A swallow during data acquisition creates a wave of motion that destroys fat suppression and blurs the image, so the whole sequence often has to be repeated.
- How is swallowing motion controlled?
- By placing a saturation band over the oral cavity and tongue to null their signal, coaching the patient to swallow only in the quiet gaps between sequences, and setting the phase-encode direction so any residual ghost falls away from the nodal stations.
- How does MR sialography work without contrast?
- A heavily T2-weighted sequence with a very long echo time keeps static saliva in the ducts bright while background tissue signal decays. That maps the salivary ducts and shows stones or strictures without any injection.
Try it in ScanFlo: Run a neck sequence while the patient swallows mid-acquisition, then again with them holding still, and compare. The swallow-blurred series is why timing and saturation bands are non-negotiable here. See ScanFlo MRI →