Clinical indication:
Skull fracture
Region:
Frontal lobe, superior orbital fissure, superior orbital margins, greater and lesser sphenoid wings, frontal and anterior ethmoid sinuses, crista galli
Patient’s Position:
Erect:
The patient is standing or sitting facing the upright detector
Tell patient to touch his nose and forehead to the bucky
The OML and mid sagittal plane is perpendicular to the bucky
Make sure that there is no rotation of the head
Prone:
Place patient in position to the xray table
Rest the patient’s forehead & nose against the table
Align the mid sagittal plane perpendicular to the table
Make sure that there is no rotation of the head
Cassette:
Size: 10’’x12’’ Orientation: Portrait
FFD/SID:
100cm
Central ray:
Central ray is angled 25°-30° cauded and center towards the nasion exit
Grid:
Yes
Respiration:
Not related
Exposure factors:
75kVp 20mAs
Collimation:
Collimate laterally to all the skin margins, superiorly to include the skull and inferiorly to include maxilla