What is an exposure chart?

• A. A schedule for film processing times
• B. A chart of radiographic densities
• C. A record of patient exposure history
• D. Guide for kVp, mA, time per projection

Answer: (D)

An exposure chart is a guide to set the exposure factors for each radiographic projection. It provides recommended kVp, mA, and exposure time (or mAs) based on the body part and patient size, aiming for consistent image density and contrast while minimizing dose. This standardization helps technologists choose the right settings and reduces repeats. It’s not about film processing times, which would be a development schedule; it’s not a chart of radiographic densities themselves, which shows image brightness rather than settings; and it’s not a record of patient exposure history, which tracks dose over time.