1|Page
LRA 225 & 226 Quizzes – 2025 Study
Guide With Correct Questions And Verified
Answers
Ethmoid sinuses-correct-answer-air cells grouped into anterior, middle and
posterior collection that incommunicate
Frontal sinuses-correct-answer-They may be singular(right and left side) paired or
even absent
maxillary sinus-correct-answer-Shows a definitive cavity at birth
The optic foramen is a small hole in the sphenoid bone that allows passage of-
correct-answer-Optic nerve
The circular base of each orbit is composed of parts of three: frontal maxilla and
zygoma-correct-answer-True
, 2|Page
What is/are the classifications of the skull?-correct-answer-All of the above
(Mesocephalic, Bradycephalic, dolichocephalic)
Which positioning line should be perpendicular to the plane of the IR for the AP
axial(Townes) projection with a 37° caudal CR angle-correct-answer-IOML
How many skull bones are present in the human body?-correct-answer-22
A patient comes to radiology for routine study of the cranium. He is unable to flex
his head and neck sufficiently the place the OML perpendicular to the IR for the
AP axial projection. What should the technologist do to compensate for this
problem without creating excessive magnification of the occipital bone.?-correct-
answer-Use the inferior OML, and increase the CR angulation by 7°
How is rotation evident on a lateral projection of the skull?-correct-answer-
Anterior and posterior separation of symmetric vertical bilateral structures.
APA axial projection of skull (Caldwell method) will require that the CR exits
through-correct-answer-Nasion
LRA 225 & 226 Quizzes – 2025 Study
Guide With Correct Questions And Verified
Answers
Ethmoid sinuses-correct-answer-air cells grouped into anterior, middle and
posterior collection that incommunicate
Frontal sinuses-correct-answer-They may be singular(right and left side) paired or
even absent
maxillary sinus-correct-answer-Shows a definitive cavity at birth
The optic foramen is a small hole in the sphenoid bone that allows passage of-
correct-answer-Optic nerve
The circular base of each orbit is composed of parts of three: frontal maxilla and
zygoma-correct-answer-True
, 2|Page
What is/are the classifications of the skull?-correct-answer-All of the above
(Mesocephalic, Bradycephalic, dolichocephalic)
Which positioning line should be perpendicular to the plane of the IR for the AP
axial(Townes) projection with a 37° caudal CR angle-correct-answer-IOML
How many skull bones are present in the human body?-correct-answer-22
A patient comes to radiology for routine study of the cranium. He is unable to flex
his head and neck sufficiently the place the OML perpendicular to the IR for the
AP axial projection. What should the technologist do to compensate for this
problem without creating excessive magnification of the occipital bone.?-correct-
answer-Use the inferior OML, and increase the CR angulation by 7°
How is rotation evident on a lateral projection of the skull?-correct-answer-
Anterior and posterior separation of symmetric vertical bilateral structures.
APA axial projection of skull (Caldwell method) will require that the CR exits
through-correct-answer-Nasion
