Which of the following is NOT a type of extra oral radiograph?

In the context of dental radiography, intraoral radiographs are taken inside the mouth, while extraoral radiographs are performed outside the mouth. The cephalometric, panoramic, and tomographs are all classified as extraoral radiographs because they capture images of the teeth, jaw, and surrounding structures from outside the oral cavity.

Cephalometric radiographs are specifically used to analyze the relationships between the teeth and skull, particularly for orthodontic assessments. Panoramic radiographs provide a broad view of the entire mouth, including the teeth, jaw, and surrounding areas, in one continuous image. Tomographs can refer to a specific type of imaging that involves a technique called tomography, where images are captured at various depths, primarily for more detailed assessment of complex structures.

In contrast, intraoral radiographs are focused on individual teeth or specific areas within the mouth, making them distinctly different from the types of radiographs that are performed externally. This clear distinction identifies intraoral radiographs as the correct answer to the question regarding which is not a type of extraoral radiograph.