Where Are the Petrous Ridges Seen on an Image of a Parietoacanthial

question 120

Multiple Choice

Where are the petrous ridges seen on an image of a parietoacanthial (Waters method) projection of the paranasal sinuses?

• A) In the middle of the maxillary sinuses
• B) Superior to the maxillary sinuses
• C) Inferior to the floor of the maxillary sinuses
• D) In the lower two thirds of the maxillary sinuses

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