To Avoid a Lead Apron Artifact on a Panoramic Radiograph

Multiple Choice

To avoid a lead apron artifact on a panoramic radiograph:

A) use a lead apron without a thyroid collar.
B) place the lead apron high around the neck of the patient so that it does not block the x-ray beam.
C) place the lead apron low around the neck of the patient so that it does not block the x-ray beam.
D) do both a and c