RAD 114 AEC

1. Should be set to 150% of the expected manual mAs
4. Where technologists can select 1, 2, or 3 cells
7. The length of time necessary for the AEC to respond to the radiation and for the generator to terminate the exposure
9. AEC is also called a….
10. Exposure switches must be this style
11. Adjusts the amount of radiation needed to terminate an exposure
15. Thin, parallel-plate chamber positioned immediately above the IR
17. Ends the exposure at an accurately measured, preset time
18. Should not be too close to an ionization chamber or it could result in a longer exposure

2. When not done properly this can result in increased repeats when using AEC
3. If a cell is not covered by any tissue it should be…
5. If this is the pathology the AEC will turn off sooner
6. Measures a preset amount of radiation and breaks the timer circuit when sufficient dose has been reached
8. Should be selected for a lateral c-spine
12. The center cell was selected for a chest so the lungs are…
13. If this is in the lungs the AEC will stay on longer
14. Leaving the collimators wide open would create more of this, which could cause the AEC to terminate too soon
16. Should be selected for a PA chest
19. Combines AEC with techniques based on anatomical regions