Multiple Choice
A radiograph of a parietoacanthial (Waters method) projection reveals that the petrous ridges are superimposed over the lower 30% of the maxillary sinuses.What specific positioning error (if any) led to this radiographic finding?
A) Insufficient extension of skull and neck
B) Excessive extension of skull and neck
C) Excessive CR angulation
D) No error exists; accept the initial radiograph.
Correct Answer:
Verified
Correct Answer:
Verified
Q19: An axiolateral oblique projection (modified Law method)
Q20: Where does the CR exit for the
Q21: What CR angle is required for the
Q22: Which of the following structures passes through
Q23: The axiolateral oblique projection (modified Law method)
Q25: Which three cranial bones articulate directly with
Q26: Which two bones form the bony nasal
Q27: The part labeled ii is the: <img
Q28: Which one of the following positioning errors
Q29: Select the imaging modality that would best