Which of the following are under the technologist's direct control in routine practice?

• A. Film processing
• B. kVp, mAs, Time and Distance
• C. Patient processing
• D. All of the above

Answer: (D)

In routine practice, the technologist directly controls every element that determines how an image is created and delivered. Setting exposure factors—kVp, mA or mAs, and exposure time—along with the distance from the tube to the image receptor shapes the amount and quality of X-rays that reach the film. The technologist also handles patient processing, which includes preparing the patient, positioning correctly, guiding the patient to stay still, and using shielding as needed. Film processing is another area of direct control, involving the development cycle, temperature and time of processing, chemical freshness, and ensuring the film is properly fixed and dried.

Because the technologist directly manages all of these aspects—exposure factors, patient handling, and film processing—every option listed falls under direct control in routine practice. Therefore, all of the above is the correct choice.