radiation protection

protocol optimization is the act of adjusting parameters, such as… (5 possible answer choices)

1. kVp

2. mAs

3. slice thickness

4. pitch

there is a(n) (direct/indirect) and (linear/exponential) relationship between kVp and pt radiation dose

direct ; exponential

a decrease in kVp leads to a(n) (increase/decrease) in the quantity of radiation produced

decrease

the section of the patient exposed as referred to as the ____ ____

dose profile

collimation indirectly affects pt dose. an increase in collimation leads to images with more noise. how can we adjust our technical factors to fix this noise?

increase mAs

wide collimation leads to an improved dose because less ________ occurs

overbeaming

ACTM stands for…

automatic tube current modulation

in the angular ACTM, the mA is adjusted according to the differences in thickness of the part as the tube rotates. there is (more/less) attenuation from the AP projection as compared to the lateral

less

in the longitudinal ATCM, the mA is adjusted as the scan proceeds along the z-axis. a(n) (increase/decrease) in the radiation dose occurs because the attenuation changes from chest, abdomen, pelvis, and so on.

decrease