CT NECK C-
(last updated 09/08/2025, last reviewed 09/08/2025)
INDICATION: Same as for CT Neck C+ with contraindication to IV contrast. Evaluation of salivary calculi. Pretreatment evaluation for thyroid cancer may be performed C- if I-131 therapy is planned.
SERIES
- 3mm Axial
- 2mm Coronal
- 2mm Sagittal
TECHNICAL PARAMETERS – ROUTINE CT NECK NONCONTRAST
POSITIONING/MODE: supine / helical
SINGLE COLLIMATION WIDTH: 0.625 mm
SLICE THICKNESS: 2.5 to 3 mm (axial)
KERNAL: soft tissue
SFOV: small (<38 cm)
COVERAGE: Skull base/sellar floor -> aortic arch
ACQUISITION: craniocaudal
IV CONTRAST: yes
INJECTION RATE: 2 mL/sec
SCAN DELAY; 35 sec
POSTPROCESSING: 2 mm coronal, 2 mm sagittal (oriented to laryngeal ventricle)