"Image technical evaluation "
"Practical points "
"alternative projections at 25° to 30° are for better visualisation of superior orbital fissures, foramen rotundum, and inferior orbital rim 4."
"orientation "
"SID"
"constantly use a side marker and regularly place it PA. Skulls can get tricky with figuring out which side is which. Many vendors tend to 'flip' images to make them appear AP"
"for those trauma patients that are unable to position for PA projection, an AP projection can be used with 15° cephalic angle and orbital-meatal line position perpendicular to image receptor (IR) 4"
Expected headings
"Image technical evaluation "
"Practical points "
"History and etymology"
"no tilting should be evident; an imaginary line through the petrous ridges should be horizontal 4"
"always guarantee that the patient is not 'hunched' over when they are being examined. This can cause an artifact from the shoulders and the patient is more likely to be rotated; it is best to move the chair up close to the detector so they are sitting up straight for the image"