SKULL

Anatomy Of Skull

Frontal View

Lateral View

AP Axial Projection

Patient Positioning 

• Depress chin, bringing OML perpendicular to IR
• Patients that unable to flex their neck, allign OML perpendicular to the IR.
• Add radiolucent support under head if needed
• Align MSP to CR and to midline of the grid / bucky
• Ensure no rotation
• IR size 24 x 30 cm
• Angle CR 30 degree caudad to OML, 36 degrees caudad to IOML
• SID 100 cm

Radiographic Image of AP Axial

Video of AP Axial

Lateral Skull

Patient Positioning

·  Remove all metal, plastic or other removable objects from head.

·  Patient erect or prone.

·  Erect may be done with dedicated head unit if available or with erect table or other erect grid-film

•   Placehead in a true lateral position, with side of interest closest to film

oblique body as needed for patient comfort. (A way to check for rotation is to palpate the external occipital protuberance posteriorly and nasion or glabella anteriorly and insure that these two points are the same distance from the film.)

·  Align midsagittal plane parallel to film, insuring no rotation or tilt.

·  To prevent head tilting, bring interpupillary line perpendicular to film

·  Adjust chin to bring infraorbitomeatal line perpendicular to front of cassette.

•   Use 10 x 12 in. circle diaphragm or collimate to outer margins of skull on all sides.

Radiographic Image Of Lateral Skull

Video of Lateral Projection

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