Which three parameters can a technologist directly assign when using automatic exposure control (AEC)?

In the context of automatic exposure control (AEC) systems, the three parameters that a technologist can directly assign include kilovoltage peak (kVp), source-to-image distance (SID), and exposure time.

Kilovoltage peak (kVp) is crucial as it controls the quality of the X-ray beam and affects the contrast of the images. By adjusting the kVp, the technologist can optimize image quality for the specific anatomy being examined.

Source-to-image distance (SID) is another key parameter that the technologist sets. This distance affects the intensity of the X-ray beam at the image receptor and can influence image resolution, magnification, and patient dose. Adjusting SID can be important for ensuring the appropriate amount of exposure for the AEC system to function effectively.

Exposure time is automatically controlled by AEC once the other parameters are set. However, it is important to note that the technologist can indirectly influence exposure time by ensuring the appropriate settings for kVp and SID are established.

Together, these parameters are essential for optimizing the performance of the AEC system, ensuring that the resultant images meet diagnostic standards with minimized radiation exposure to the patient. The other options provided include incorrect combinations of parameters that do not accurately represent those that