CT NECK C- (last updated 10/28/2020, last reviewed 10/28/2020)
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
| | |
|
POSITIONING/MODE
|
supine/helical |
|
kV/mA/rot time
|
120 kV/auto mA/1 sec or less |
|
DETECTOR COLLIMATION
|
16 x 1.5mm (S16) 24 x 1.2mm (D4) |
|
SLICE THICKNESS
|
2.5 to 3mm |
|
PITCH
|
1 to 1.5 |
|
KERNAL
|
soft tissue |
|
SFOV
|
<38 cm |
|
COVERAGE
|
Skull base/sellar floor -> aortic arch |
|
ACQUISITION
|
craniocaudal |
|
IV CONTRAST
|
none |
|
POSTPROCESSING
|
2mm Coronal, 2mm Sagittal Cor/Sag MPRs parallel to laryngeal ventricle |