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