LRA-226 Final Review Flashcards
what is the clinical indication for an AP Axial projection/AP Towne?
- skull fractures (medial and lateral displacement)
- neoplastic processes
- Paget’s disease
what is the patient position for an AP axial projection/AP Towne?
- depress the chin
- align OML with the EAM
- alignment will be perpendicular to the IR
what is the CR for an AP Axial projection/AP Towne view?
- 2 inches above the glabella
- tube angle of 30 degrees caudal to the OML
if the patient cannot depress chin to align the OML with the EAM, what changes need to be made?
- change the tube angle to 37 degrees caudal
- change the alignment to the IOML w/ the EAM
what anatomy is demonstrated in a AP Axial projection/AP Townes view?
- occipital bone
- petrous pyramids
- foramen magnum
- dorsum sellae
- posterior clinoid process
- petrous ridges should be symmmetrical
what is the clinical indication for a Lateral skull?
- skull fractures
- neoplastic processes
- Paget’s disease
what is the patient position for a Lateral skull?
- place head in a true lateral position
- align the IOML with the EAM
- alignment is parallel to the IR
- MSP line is parallel to the IR
- IPL is perpendicular to the IR
- IOML is perpendicular to the front edge of the IR
what is the CR for a lateral skull?
2 inches above/superior to the EAM
what anatomy is demonstrated in a Lateral skull?
- entire cranium is visualized
- superimposed parietal bones of the cranium
- sella turcica (profile)
- anterior and posterior clinoid process
- dorsum sellae
- clivus (profile)
what is the clinical indication for a PA Axial Caldwell of the skull?
- skull fractures
- neoplastic processes
- pagets disease
what is the patient positions for a PA Axial caldwell of the skull?
- rest the patients nose and forehead to the IR
- flex neck to align OML with EAM
- alignment is perpendicular to the IR
- MSP is perpendicular to the IR
what is the CR of a PA Axial caldwell of the skull?
- CR tube angle of 15 degrees caudad
- exits the nasion
what anatomy is demonstrated in a PA Axial Caldwell skull?
- frontal bone
- greater and lesser sphenoid wings
- superior orbital fissure
- frontal and anterior ethmoid sinus
- supraorbital margins
- crista galli
- petrous pyramids are projected into the lower one-third of the orbits
what is a clinical indication for a PA projection Skull?
- skull fractures (medial and lateral displacement)
- neoplastic processes
- Pagets disease
what is the patient position for a PA projection Skull?
- rest patient’s nose and forehead against IR
- align OML with the EAM
- alignment is perpendicular to the IR
- MSP is perpendicular to the IR
