LRA 226 FINAL EXAM LATEST
A patient comes to radiology with a history of a possible erosion of the
superior orbital fissures. Which of the following projections would best
demonstrate this structure? - ANSWERS-PA Axial with 25-30 degree
caudal angle to OML
How much difference is there between the OML and IOML positioning
lines? - ANSWERS-7° to 8°
Which projection best demonstrates the floor of the orbits? -
ANSWERS-Modified parietoacanthial (modified Waters)
Why is the chin extended for an axiolateral oblique projection of the
mandible? - ANSWERS-To prevent superimposition upon the cervical
spine
The modified Law method for TMJs requires a ____ rotation of the skull
and a ____ angle of the CR. - ANSWERS-15 -degree rotation of the
skull and a 15 degree angle of the CR
A radiograph of a PA Caldwell projection reveals that the petrous ridges
are projected into the lower one third of the maxillary sinuses. Which of
the following modifications should be made during the repeat exposure
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, LRA 226 FINAL EXAM LATEST
to produce a more diagnostic image? - ANSWERS-Nothing; accept the
initial radiograph.
A pediatric patient enters radiology for a paranasal sinus series. Because
of her age, the child is unable to hold still for the projections even with
the use of immobilization devices. The decision is to hold the child
during each exposure. Which of the following individuals should be
asked to hold the child? - ANSWERS-Guardian
What projection of the skull requires the central ray (CR) to be centered
to exit at the glabella? - ANSWERS-PA
How many skull bones are present in the human body? - ANSWERS-22
Which one of the following positioning errors most often results in a
repeat exposure of a cranial position? - ANSWERS-Rotation
How is rotation evident on a lateral projection of the skull? -
ANSWERS-Anterior and posterior separation of symmetric vertical
bilateral structures.
Where is the CR centered for a lateral projection of the cranium? -
ANSWERS-Two inches (5 cm) superior to EAM
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PAGE 2
A patient comes to radiology with a history of a possible erosion of the
superior orbital fissures. Which of the following projections would best
demonstrate this structure? - ANSWERS-PA Axial with 25-30 degree
caudal angle to OML
How much difference is there between the OML and IOML positioning
lines? - ANSWERS-7° to 8°
Which projection best demonstrates the floor of the orbits? -
ANSWERS-Modified parietoacanthial (modified Waters)
Why is the chin extended for an axiolateral oblique projection of the
mandible? - ANSWERS-To prevent superimposition upon the cervical
spine
The modified Law method for TMJs requires a ____ rotation of the skull
and a ____ angle of the CR. - ANSWERS-15 -degree rotation of the
skull and a 15 degree angle of the CR
A radiograph of a PA Caldwell projection reveals that the petrous ridges
are projected into the lower one third of the maxillary sinuses. Which of
the following modifications should be made during the repeat exposure
END OF
PAGE 1
, LRA 226 FINAL EXAM LATEST
to produce a more diagnostic image? - ANSWERS-Nothing; accept the
initial radiograph.
A pediatric patient enters radiology for a paranasal sinus series. Because
of her age, the child is unable to hold still for the projections even with
the use of immobilization devices. The decision is to hold the child
during each exposure. Which of the following individuals should be
asked to hold the child? - ANSWERS-Guardian
What projection of the skull requires the central ray (CR) to be centered
to exit at the glabella? - ANSWERS-PA
How many skull bones are present in the human body? - ANSWERS-22
Which one of the following positioning errors most often results in a
repeat exposure of a cranial position? - ANSWERS-Rotation
How is rotation evident on a lateral projection of the skull? -
ANSWERS-Anterior and posterior separation of symmetric vertical
bilateral structures.
Where is the CR centered for a lateral projection of the cranium? -
ANSWERS-Two inches (5 cm) superior to EAM
END OF
PAGE 2
