A Radiopaque,cone-Shaped Artifact on a Panoramic Image That Interferes with the Diagnostic

Multiple Choice

A radiopaque,cone-shaped artifact on a panoramic image that interferes with the diagnostic information is caused by the:

A) patient's chin was too high during the procedure.
B) patient's lead apron was incorrectly placed or a lead apron with a thyroid collar was used.
C) patient's head was posterior to the focal trough.
D) patient moved during the procedure.