Radiologic Technologist Practice Exam

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On an axiolateral oblique projection of the temporomandibular joints (TMJs), how is the patient's head positioned?

Superiorly; posteriorly
Inferiorly; posteriorly
Superiorly; anteriorly
Inferiorly; anteriorly

The correct answer is: Superiorly; posteriorly

In the axiolateral oblique projection of the temporomandibular joints (TMJs), the correct positioning of the patient's head is critical to obtaining clear and accurate images. The head is positioned with the long axis of the mandible parallel to the image receptor, and it is rotated approximately 15-20 degrees toward the side being imaged. This means that the patient's head is tilted superiorly and slightly posteriorly in order to visualize the TMJs effectively and minimize superimposition of the structures in the area. By angling the head in this manner, the radiologic technologist ensures that the joint space can be adequately demonstrated on the radiograph, allowing for proper assessment of the TMJs. Understanding this positioning technique is essential for radiologic technologists, as it directly influences the quality of the diagnostic images produced during imaging procedures.