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Questions and Answers
In a Caldwell radiograph, what radiographic criteria indicate the correct positioning of the patient?
In a Caldwell radiograph, what radiographic criteria indicate the correct positioning of the patient?
- Sphenoid sinuses visualized lateral to each nasal bone
- Ethmoid air cells directly below the frontal sinuses
- Frontal sinuses projected above the frontonasal suture (correct)
- Maxillary sinuses visualized free from superimposing structures
What is the primary purpose of an SMV projection for the paranasal sinuses?
What is the primary purpose of an SMV projection for the paranasal sinuses?
- View the ethmoid air cells
- Assess the frontal sinuses
- Obtain an inferior view of the sphenoid sinus (correct)
- Visualize the maxillary sinuses
Which paranasal sinus structure should be visualized free from superimposing alveolar processes in a Waters method radiograph?
Which paranasal sinus structure should be visualized free from superimposing alveolar processes in a Waters method radiograph?
- Inferior orbital rim
- Frontal sinus
- Sphenoid sinus
- Maxillary sinus (correct)
What is the correct position of the head in a parietoacanthial (Waters method) radiograph for the paranasal sinuses?
What is the correct position of the head in a parietoacanthial (Waters method) radiograph for the paranasal sinuses?
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Which special projection technique provides an oblique view of the frontal sinuses?
Which special projection technique provides an oblique view of the frontal sinuses?
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When performing a lateral PNS radiograph, which structure should be positioned lateral to each nasal bone?
When performing a lateral PNS radiograph, which structure should be positioned lateral to each nasal bone?
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