Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
RAD106 final review
| Question | Answer |
|---|---|
| X-ray intensity is directly proportional to _____. | mAs |
| The main purpose of added filtration is to reduce ____________. | patient dose |
| When SID is increased, mAs must be increased by __________ to maintain constant exposure to the image receptor. | square of SID ratio |
| X-ray beam energy is improved by ____________. | increasing filtration |
| X-ray intensity is proportional to ____. | kVp2 |
| Added filtration will ______ beam energy and ______ HVL. | increase, increase |
| The HVL is lowered by a decrease in ________. | kVp |
| X-ray quantity is _______ proportional to the ________ of the distance from the source. | inversely, square |
| Increasing kVp increases the _________ of an x-ray beam. | energy |
| A compensating filter is used to create ________ exposure with a body part of _________ thickness. | uniform, nonuniform |
| If the quantity of electrons hitting the target is doubled, the x-ray intensity is __________. | increased by a factor of two |
| The inverse square law has the same effect on x-ray ________ and x-ray _________. | intensity, exposure |
| If a technologist changes the technique from 70 kVp @ 200 mAs to 70 kVp @ 400 mAs, the x-ray intensity will _________. | double |
| Image contrast is affected by ________. | beam quality and kVp |
| The number of x-rays in the useful beam defines x-ray ________. | intensity |
| High kVp techniques reduce ____________. | patient dose |
| Compton interactions, photoelectric absorption, and transmitted x-rays all contribute to _________________. | differential absorption |
| Coherent scattering is an interaction between _______ x-rays and atoms. | low-energy |
| Compton scattering is an interaction between an x-ray and a(n) _________ electron that results in ionization and loss of energy. | outer-shell |
| Pair production is an interaction between an x-ray and a(n) _________ that causes the x-ray to disappear and causes two electrons to take its place. | nuclear electric field |
| If 5% of an incident beam is transmitted through a body part, then 95% of that beam was ______________. | attenuated |
| X-rays transmitted without interaction contribute to ___________________. | the radiographic image |
| The photoelectric effect is an interaction between an x-ray and a(n) _________ electron that results in total x-ray absorption. | inner-shell |
| At energies below 40 keV, the predominant x-ray interaction in soft tissue and bone is ______________. | photoelectric absorption |
| Because of differential absorption, about _____% of the incident beam from the x-ray tube contributes to the finished image. | 0.5% |
| ___________ occurs only at the very high energies used in radiation therapy and in nuclear medicine P.E.T. imaging. | pair production |
| As kVp ___________, the probability of photoelectric absorption ______________. | increases, decreases |
| Attenuation is caused by ______________. | absorption and scattering |
| An outer-shell electron is ejected and the atom is ionized during _____________. | compton interactions |
| Which has the greatest mass density? | bone |
| Which x-ray interaction involves the ejection of the K-shell electron? | photoelectric absorption |
Created by:
travis686