Paranasal Sinuses (CT) PRINT

Last updated: 2/20/2021.
What changed: N/A


History: Sinusitis, congestion, pressure
PARANASAL SINUSES
LocalizerFrontal and lateral
Angulationparallel to hard palate; face should be parallel to floor
Scan typehelical
kVp120
Target CTDIvol (mGy)<15
Max CTDIvol (mGy)20
Fixed mAs50 mAs / rotation
Max scan time20 sec
Pitch0.9-1.5:1
DFOV15-17
ContrastShould not be ordered
Coverage
Axhard palate through frontal sinuses
Cornose through clivus
Sagear to ear
SEND TO PACS
Soft: 1 mm ax
Bone: 1 mm ax, sag, cor
Key tips:
  • Place BB market on right check aligned with pupil of eye at the level of the nostril.
Axial: only need anterior to mastoid air cells 

Coronal: only need to top of frontal sinus through maxillary alveolar ridge