Which of the following is NOT an evaluation criterion for a lateral projection of the skull?

In evaluating a lateral projection of the skull, the primary criteria focus on the positioning and anatomical relationships within the skull and how they are visualized. The correct answer is related to what is typically assessed during this imaging.

When a lateral projection of the skull is performed, certain structures are expected to demonstrate specific relationships. For instance, the need for superimposed temporomandibular joints (TMJs) confirms that the skull is properly positioned, allowing for the visualization of important features. Similarly, ensuring that there is no overlap of the cervical spine by the mandible is vital; it confirms the adequacy of the lateral positioning and reduces distortion. Additionally, the sella turcica, which is a key anatomical landmark for orientation in the skull, must be seen in profile on a well-executed lateral projection.

However, the superior orbital fissure is not a structure that is typically evaluated in a lateral projection of the skull. In this view, the superior orbital fissure may not be clearly visible or is not a criterion used to determine the quality of the lateral skull radiograph. Thus, focusing on the evaluation criteria that are specifically pertinent to assessing skull radiographs, the visibility of the superior orbital fissure is not one of those crucial criteria