Question

4 multiple choice 1 point density controls should be used: changes in patient thickness changes in distance activated cells cant be adapted to the necessary positioning tube is old 5 fill in the blank 1 point what is the length of time for the aec to response to send ionization and send a signal to terminate the exposure type your answer_

Explanation:

1. For the multiple - choice question, density controls in imaging are used to account for changes in patient thickness as it affects the radiation absorption and image density.
2. For the fill - in - the blank question, the AEC (Automatic Exposure Control) typically responds very quickly, usually within milliseconds to terminate the exposure once the appropriate ionization level is reached.

Answer:

1. changes in patient thickness
2. milliseconds