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
RADT456
Radiation Protection
| Question | Answer |
|---|---|
| All electromagnetic radiations have the same ________ but differ in _______ and ___________. | Velocity Wavelength Frequency |
| (More or Less)_______ energetic radiations have shorter wavelength and higher frequency. | More |
| A high-speed electron is deflected from its path and the loss of kinetic energy is emitted in the form of an x-ray phonton; is __________ Radiation. | Bremsstrahlung |
| A high-speed electron ejects a tungsten K-shell electron, leaving a K-shell vacancy. An electron from the L shell fills the vacancy and emits a K-characteristic ray; is ___________ Radiation. | Characteristic |
| A relatively low-energy x-ray photon interacts with tissue and uses all its energy to eject an inner shell electron; is _________ Effect. | Photoelectric |
| A fairly high-energy x-ray photon interacts with tissue and ejects an outer shell electron; is _________ Scatter. | Compton |
| Low LET radiations deposit (more or less) energy in cells/tissues along their path, than high-LET radiations. | Less |
| Usually a result of high dose in short period of time; is (early or late) effects. | Early |
| threshold, non-linear, all early effects, some late effects; is (deterministic or stochastic). | Deterministic |
| no threshold, linear, genetic effects, cancer, most late effects; is (deterministic or stochastic). | Stochastic |
| Diagnostic x-rays have _____ wavelengths and are considered ____ LET radiation. | extremly short low |
| How are wavelength and energy related? | Inversely |
| Collimators must be accurate to within ____% of the SID. | 2% |
| Made of aluminum and used to reduce patient dose by removing low-energy photons is ________? | Filtration |
| <50 kV requires ___mm AL equivalent filtration. | .5 |
| 50-70 kV requires __mm AL equivalent filtration. | 1.5 |
| >70 kV requires __mm AL equivalent filtration. | 2.5 |
| AEC (can or cannot)compensate for a speed system. | cannot |
| Function to remove a large % of scattered radiation from the remnant beam before reaching the IR, improving the radiographic contrast; is________? | Grid |
| Using high-speed film and screen combination can (inc. or dec.) patient dose. | dec. |
| Primary radiation barriers must be __feet high. | 7 |
| Measure of dose to tissue? | Rem (Sv) |
| Crystals used in an optically luminescent dosimetry system? | Aluminum oxide |
| Unit of measurement used for occupational exposure? | Rem (Sv) |
| Pb thick. 75kV 100kV .25 mm - 66% - 51% .50 mm - 88% - 75% 1.0 mm - 99% - 94% this chart is ________? | Attenuation Characteristics of Lead Aprons |
Created by:
ertempel
Popular Radiology sets