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wk 12 rad106
| Question | Answer |
|---|---|
| At energies below 40 keV, the predominant x-ray interaction in soft tissue and bone is ______________. | photoelectric absorption |
| If 5% of an incident beam is transmitted through a body part, then 95% of that beam was ______________. | attenuated |
| Compton interactions, photoelectric absorption, and transmitted x-rays all contribute to _________________. | differential absorption |
| Photodisintegration is an interaction that takes place at which energy level? | Energies higher than 10 MeV |
| X-rays transmitted without interaction contribute to ___________________. | the radiographic image |
| High kVp techniques reduce ____________. | patient dose |
| The photoelectric effect is an interaction between an x-ray and a(n) _________ electron that results in total x-ray absorption. | inner shell |
| Coherent scattering is an interaction between _______ x-rays and atoms. | low energy |
| Increasing kVp increases the _________ of an x-ray beam. | energy |
| X-ray quantity is _______ proportional to the ________ of the distance from the source. | inversely; square |
| X-ray quantity increases in direct proportion to increases in __________. | mAs |
| The number of x-rays in the useful beam defines x-ray ________. | Intensity |
| If a technologist changes the technique from 70 kVp @ 200 mAs to 70 kVp @ 400 mAs, the x-ray intensity will _________. | double |
| The penetrability of an x-ray beam is called x-ray ________. | quality |
| If filter thickness is ________, then x-ray intensity is ________. | increased; decreased |