When using film, the corrective action for a radiograph that displays a "tire track" pattern is to:

a. thoroughly clean the rollers of the automatic processor.
b. position film intraorally with the tube side toward the source of radiation.
c. carefully separate the lead foil from the film packet before processing.
d. lower the temperature of the processing chemicals.

b. A pattern representing the embossed lead foil that is in the back of a film packet will leave a pattern resembling a tire track or diamond pattern on the processed radiograph if the film packet was placed backward in the mouth.