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RADT 465 Safety
Radiation Safety
| Question | Answer |
|---|---|
| electromagnetic radiation velocity source: pg 237 | 3 x10 ^8 m/s |
| distance between two consecutive wave crests source: pg. 237 | wavelength |
| # of cycles/sec, measured in Hz source: pg. 237 | frequency |
| source of electrons source: pg. 240 | heated cathode filament |
| comprises 70-90% of the primary beam source: pg. 240 | Bre,sstrahlung Radiation |
| when a high speed electron comes in contact with a tungsten atom, ejecting a K-shell electron. comprises 10-30% of the x-ray beam source: pg 240 | Characteristic Radiation |
| rate of which ionizing radiation passes through tissue source: pg. 241 | attenuation |
| contributes significantly to pt. dose source: pg. 241 | photoelectric effect |
| contributes to scattered image fog and hazardous to radiology personnel source: pg. 241 | Compton Scatter |
| a dose-response relationship directly proportional to the radiation dose received source: pg. 243 | linear |
| dose-response occurring after a particular radiation dose has been received source: pg. 243 | linear threshold |
| dose-response in which there is no safe dose source: pg. 243 | nonthreshold |
| leukemia, genetic effects, cataracts, erythema source: pg. 244 | late effects |
| study of effects ionizing radiation has on biologic material level, specifically the cellular level source: pg.246 | radiobiology |
| the rate radiation deposits energy at is passes through tissues is known as source: pg. 246 | LET |
| diagnostic x-rays are considered to be a _____ ____ source: pg. 247 | low LET |
| a small dose of radiation delivered over s longer period of time of which produces a lesser effect is termed source: pg. 248 | fractionation and protraction |
| what is the most radiosensitive cell? source: pg. 250 | lymphocyte |
| ____ ________ holds the most significant impact in regard to pt. dose source: pg. 253 | beam restriction |
| annual gonadal dose to the childbearing age population source: pg 252 | 0.2 mSv |
| radiation effects manifested within minutes, hours, days, weeks of exposure source: pg. 253 | early somatic effect |
| radiation effects occurring years after initial exposure source: pg. 253 | late somatic effect |
| at what large dose will mild erythema result within 1 to 2 days post exposure? source: pg. 254 | 2 Gy |
| ________ syndrome occurs between doses of 10 and 100 Gy, death occurs within 2 weeks source: pg. 254 | GI |
| ________ syndrome occurs at doses greater than 50 Gy source: og. 254 | CNS |
| 4 stages of ARS: source: pg. 255 | prodromal, latent, manifest, recovery or death |
| NCRP guidelines state collimators must be __% accurate within the SID source: pg. 264 | 2 |
| controls quantity, has no effect on quality source: pg. 265 | mAs |
| controls quality, has no effect on quantity source: pg. 265 | kVp |
| the target/focal spot x-ray photons comprise a _________ primary beam. source: pg. 265 | polyenergetic |
| filters are typically made of ___________ source: pg. 265 | aluminum |
| ____ are used to remove low-energy photons to save on pt. dose source: pg. 265 | filters |
| the entrance skin dose is ____ than the exit dose source: pg. 270 | greater |
| exact positioning and centering are critical when using ____ source: pg. 271 | AEC |
| grids are used on body parts measuring greater than ____ source: pg. 273 | 10 cm |
| what technique has a similar function to a low-ratio grid? source: pg. 273 | air-gap technique |
| a total filtration of ______ is required when using equipment operating above 70kV source: pg. 275 | 2.5 mm Al |
| single phase equipment is tested by what tool? source: pg. 275 | simple spinning top |
| exposure switches much be ____ ___ type source: pg. 275 | dead-man |
| radiographers should never be exposed to the ____ beam source: pg. 281 | primary |
| scattered and leakage source: pg. 281 | secondary radiation |
| NCRP recommends personal monitoring for those who may receive ___ mSv/year. source: pg. 281 | 5 |
| cardinal principles (source: pg. 282 | time, distance, shielding |
| ______ radiation is radiation emitted from the x-ray tube in directions other than the primary beam source: pg. 282 | leakage |
| T/F: radiologic technologists can be used to hold patients for x-ray procedures. source: pg. 283 | F |
| protective lead aprons must be at least a ____ Pb equivalent source: pg. 283 | .25mm |
| NCRP recommends a ____ mm Pb equivalent source: pg. 283 | .5 |
| greatest amount of occupational exposure occurs in source: pg. 284 | mobile radiography and fluroscopy |
| barriers that protect from the useful beam source: pg. 285 | primary |
| barriers that protect from scattered and leakage radiation source: pg. 285 | secondary |
| areas occupied by radiation workers and patients source: pg. 285 | controlled area |
| areas occupied by the general population source: pg. 285 | uncontrolled area |
| primary protective barriers must be 1/16 in lead thick and ___ ft high source: pg. 285 | 7 |
| _____ barriers include the area of the walls above 7 ft high source: pg. 285 | secondary |
| the control booth is an example of source: pg. 285 | secondary barrier |
| lead aprons, gloves, and other apparel are considered secondary barriers, meaning they don't protect from the _____ beam. source: pg. 287 | primary/useful |
| how should lead aprons be stored? source: pg. 288 | should be hung on appropriate racks to prevent cracking |
| mobile x-ray cord must be at least___ ft in length source: pg. 289 | 6 |
| source: | Saia, D.A.(2018). Radiography Prep (9th ed). McGraw-Hill. |
Created by:
agoldman1
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