What is phototiming used to achieve in radiography?

• A. Eliminate the need for film
• B. Provide error-free images
• C. Improve density control and reduce repeats
• D. Increase exposure latitude

Answer: (C)

Phototiming is an automatic exposure control that uses a detector to monitor the amount of radiation reaching the image receptor and stops the exposure when a preset film density is achieved. This keeps image density consistent across different patients and views, so under- or overexposure is less likely and repeat exams are reduced. It doesn’t eliminate film use, guarantee perfectly error-free images, or inherently increase the range of exposures that will be acceptable. Its purpose is to stabilize the exposure so the final image has the desired density with fewer repeats.