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RADT465-Rad Safety
ARRT Registry Review Covering Radiation Protection
| Question | Answer |
|---|---|
| What is the unit of measurement for frequency? | Hertz (Hz) (Lange Prep Pg. 225) |
| Which type of ionizing radiation composes the majority of our exposure? | Natural background radiation (Lange Prep Pg. 226) |
| Which interaction is a high energy x-ray photon that ejects an outer shell electron? | Compton scatter (Lange Prep Pg. 228) |
| True or False. In a threshold curve, there is no safe dose. | False (Lange Prep Pg. 231) |
| Which type of curve means that the effect of radiation are not proportional to the dose received? | Nonlinear curves (Lange Prep Pg. 231) |
| According to the Law of Bergonie and Tribondeau, which 3 tissues are particularly radiosensitive? | Stem cells, young/immature cells, and highly mitotic cells (Lange Prep Pg. 233) |
| Are diagnostic x-rays considered low or high LET radiation? | Low LET radiation (Lange Prep Pg. 234) |
| What dose is needed for central nervous system (CNS) acute radiation syndrome? | 5000 rad (50 Gy) (Lange Prep Pg. 241) |
| In which stage of acute radiation syndrome do symptoms disappear? | Latent stage (Lange Prep Pg. 242) |
| What is the most efficient beam-restricting device? | Collimator (Lange Prep Pg. 250) |
| What type of kV and mAs values should be used to extend tube life? (high or low) | High kV and low mAs (Lange Prep Pg. 253) |
| What is the total filtration requirement for equipment operated above 70 kV? | 2.5 mm Al equipment (Lange Prep Pg. 254) |
| What are the 3 indicators for the effective use of gonadal shields? | Gonads are in or within 5 cm of collimated field, reproductive age, diagnostic objectives permit (Lange Prep Pg. 255) |
| What are the 2 types of AEC? | Ionization chambers and photo timers (Lange Prep Pg. 259) |
| What happens to patient dose when a grid is used? | Patient dose increases (Lange Prep Pg. 261) |
| What is the source-to-skin distance (SSD) for fixed fluoroscopic equipment? | 15 inches (Lange Prep Pg. 263) |
| What is the most important source of scatter radiation? | The patient (Lange Prep Pg. 270) |
| What must the tabletop intensity of the fluoroscopic beam be less than? | 10 R/min (Lange Prep Pg. 271) |
| What are the requirements for primary protective barriers? | 1/16 inch lead thickness and 7 feet high (Lange Prep Pg. 272) |
| What is the gestational dose limit to the fetus during the gestation period? | Must not exceed 500 mrem (5mSv) (Lange Prep Pg. 274) |
| What are the traditional radiation units of measurement? | Roentgen, rad, rem (Lange Prep Pg. 281) |
| What does rad stand for and what is its SI unit? | Radiation absorbed dose, Gray (Lange Prep Pg. 282) |
| Which radiation monitor uses lithium fluoride? | Thermoluminescent dosimeter (TLD) (Lange Prep Pg. 285) |
| Which radiation monitor allows for an immediate reading? | Pocket dosimeter (Lange Prep Pg. 285) |
| How do you determine the lifetime cumulative exposure for the occupationally exposed individual? | 1 rem x age in years (Lange Prep Pg. 289) |
Created by:
marchuleta1
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