click below
click below
Normal Size Small Size show me how
xray boards
skull questoins
Question | Answer |
---|---|
which view will best demonstrate the maxillary sinuses? | parietocanthial aka "water's method" |
lateral deviation of the nasal septum may be best demonstrated in which position? | parietocanthial aka "water's method" |
if the patient's zygomatic arch has been depressed, or the pt has flat cheekbones, how can you modify the SMV projection? | rotate the pt's head 15 degrees towards the side being examined. |
is the MSP parrallel or perp for an exact PA of the skull | parrallel |
a true lateral position of the skull uses what principles? | interpupillary line perp to IR IOML parrallel to transverse axis of IR |
the SMV oblique axial projection for the zygo arches requires the skull be rotated how many degrees? | 15d towards the affected side |
what should be visualized through the foramen magnum in the AP axial "Grashey" of the skull for the occipital bone? | * posterior clinoid prcesses * dorsum sella |
PA axial projection of the skull "Caldwell" | *CR caudad to the OML *petrous pyramids are projected into the lower third of the orbits *frontal sinuses visualized |
what do we use the Caldwell (PA axial skull) view for? | demo the frontal and ethmoid bones and the frontal and ethmoidal sinuses |
how do we angle the CR for a Caldwell of the skull? | 15d caudad to OML |
in the Rhese method of the optical canal, the MSP nd the CR form what angle? | 37d the MSP should form a 53d angle with the film |
Incorrect rotation of the MSP in the Rhese method of the optical canal results in | lateral displacement |
incorrect positioning of the baseline in the Rhese methos results in | longitudinal displacement of the optic canal |
Which of the following skull positions will demonstrate the cranial base, sphenoidal sinuses, atlas, and odontoid process? | SMV |