DANB Radiology Exam | 130 Questions with 100% Correct Answers

What is the base of dental film composed of? - blue tinted polyester acetate What is the emulsion composed of? - gelatin and silver halide crystals What determines the speed of dental films? - size of crystals, thickness of emulsion, radiosensitive dyes What is the purpose of the lead foil? - absorb scatter radiation and prevent fogging What Film speed is faster and reduces radiation exposure to patient? - F- Speed What size film is used for PA's on small children - #0 what size film is used for Bite-wings on adults when only one film is taken on each side - #3 size film used for anterior PA's for patients with narrow arches - #1 size film used for PA's on adults - #2 size film used for BW on adults - #2 size film used for occlusals on adults - #4 What is the purpose of the embossed dot - to determine film orientation, to help aid in mounting radiographs in anatomical order What is the latent image - invisible image (remains like this until film is processed)