Normal ultrasound findings using high frequency linear probe. Regions include:
- level 1a between digastric muscles
- thyroid isthmus
- both thyroid lobes (which includes carotid and jugular bulb)
- submandibular glands (can be followed from midline - submandibular hilum sits just above myelohyoid)
- parotid glands (focus can be dropped to inspect deep lobes)
- level 2 to hyoid (including jugulodigastric nodes which can be up to 15 mm in normal circumstances)
- level 3 from hyoid to cricoid
- level 4 from cricoid to clavicles
- level 5 from posterior border of sternocleidomastoid