An AP Waters projection can be distinguished from a PA Waters projection because the AP projection demonstrates: 1. greater orbital magnification 2. less distance from the lateral orbital rims to the lateral cranial borders 3. the petrous ridges superior to the maxillary sinuses 4. less resolution in the nasal region

For an accurate PA Axial Skull projection (Caldwell method), the: 1. midsagittal plane is aligned perpendicular to the IR 2. central ray is angled 15 degrees caudally 3. OML is aligned perpendicular to the IR 4. central ray is centered to the acanthion

The open-mouth PA Waters for Sinuses is used to visualize which sinus(es) best? (1) Frontal (2) Ethmoid (3) Maxillary (4) Sphenoid

Which of the following skull positions would BEST demonstrate the sella turcica in profile?

What position and procedure was performed here for this accurately positioned image? 27..png 

PA Axial Caldwell: what was the error? 5..png 

A poorly positioned PA Axial Caldwell, cranial projection demonstrates the petrous ridges inferior to the infraorbital margins. What was the error? Select all that applies. 1. Patient’s was tucked too low 2. CR was insufficiently angled 3. CR was excessively angled 4. Patient’s chin was too high

A PA Skull projection with accurate positioning demonstrates: 1. equal distances from lateral orbital margin to lateral borders of the skull on both sides 2. the frontal bone of interest 3. the petrous ridges horizontally through the lower third of the orbits 4. demonstrate maxillary sinuses without superimposition of petrous ridges

What MAJOR positioning error occurred in this image for sinuses? 2..png 

What is the projection/ or position of this exam?bowel2.png