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RADT 465
Radiation Safety
| Question | Answer |
|---|---|
| Radiation dose delivered continuously but at a lower dose rate | Protraction |
| ____ syndrome can lead to death within hours to days following exposure. | Central Nervous Syndrome |
| Equal dose of radiation delivered with time interval separations | Fractionation |
| This will improve contrast but will increase patient exposure due to the increase in the technique that is required. | Grid |
| Syndrome of ARS that presents following 600 to 1000 rads of radiation dose. | Gastrointestinal |
| Effects from radiation that do not appear until months or years after exposure. | Late |
| When cels die without attempting to divide; also called interphase death | Apoptosis |
| Operating above ____ kV, an x-ray unit must have 2.5 mm of aluminum filtration. | 70 |
| Cataract formation | Cataractogenisis |
| Tissues are more radiosensitive under this condition. | Aerobic |
| _____ should be made at 0.5 mm aluminum equivalent | Lead |
| This typer of graph represents a direct response between radiation dose and biologic effect. | Linear |
| 500-600 rads can cause _____ sterility. | Permanent |
| The trimester in which the embryo/fetus is most radiosensitive | First |
| Designed to maintain constant density on images taken on wide variety of patients | AEC |
| As LET increases, cell's chance of survival and recovery _____. | Decreases |
| Any amount of radiation would result in a biological response according to this radiation dose response relationship model. | Nonthreshold |
| Filtration that is present in the x-ray beam due to construction of the x-ray machine | Inherent |
| CNS, GI, and _____ are all syndromes of acute radiation syndrome (ARS) | Hematopoietic |
| Radiation interaction with water; the ionization of water | Radiolysis |
| The rate of energy deposited per unit track length through an absorber. | Linear Energy Transfer (LET) |
| Minimum source to table (patient) distance fo a mobile fluoroscopy unit | 12 inches |
| Signifies the whole body dose of radiation that can be lethal to 50% of the exposed population within 30 days | LD 50/30 |
| Theory that used to try to explain why some cells can survive and recover from radiation interactions while other die | Target theory |
| _____ effects occur when radiation interacts with the DNA molecule of a cell | Direct |
| ____ film/screen speed system will decrease patient dose but will also decrease recorded detail | Increasing |
| The higher the kVp used, the less patient dose (ESE) there will be, but the image will have a _____ scale of contrast. | Longer |
| Effects from radiation that will occur within minutes, days, weeks, following the exposure. | Early |
| The primary purpose is to reduce the number of low energy x-rays within the useful beam | Filtration |
| Which interaction is the most dangerous to the technologists? | Compton Scatter |
| An electron that gets ejected with a charge | Photoelectron |
| At a higher kVp, ______ is more prevalent. | Compton Scatter |
| Compton Scatter always absorbs ____ of the energy. | 2/3 |
| What are the other names for Coherent Scatter? | Classical, Unmodified, Thompson, and Raleigh Scatter |
| No harm, no foul defines which interaction? | Coherent Scatter |
| The emission of the secondary radiation during Photoelectric Absorption allows the body to produce _____. | Internal radiation/characteristic radiation |
| This interaction occurs below 10 kV. | Coherent Scatter |
| Deals with germ cells | Meosis |
| Deals with every other cell within the body | Mitosis |
| True/False: You want a low kVp with a high mAs when taking an exposure. | False |
| When positioning for a skull/facial bones, should you place the patient AP or PA? | PA |
| When positioning for a cervical oblique, should you place the patient AP or PA? | PA (RAO/LAO) |
| When positioning for a thoracic spine, should you place the patient AP or PA? | PA (RAO/LAO) |
| What is the minimum lead equivalent for lead aprons? | 0.5 mm Pb/eq |
| What is the minimum lead equivalent for gloves? | 0.25 Pb/eq |
| What is the minimum lead equivalent for thyroid shields? | 0.5 mm Pb/eq |
| What is the minimum lead equivalent for glasses? | 0.35 mm Pb/eq |
| What is the minimum lead equivalent for bucky slot covers? | 0.25 mm Pb/eq |
| What is the minimum lead equivalent for fluoroscopy drapes? | 0.25 mm Pb/eq |
| What is the minimum lead equivalent for clear lead-plastic overhead protective barrier? | 0.5 mm Pb/eq |
| What is the annual occupational dose limit? | 50 mSv or 5 rem |
| What is the annual occupational dose limit for the lens of the eye? | 150 mSv or 15 rem |
| What is the annual occupational dose limit for the skin, hands, and feet? | 500 mSv or 50 rem |
| What is the annual public dose limit? | 5 mSv or 0.5 rem |
| What is the annual public dose limit for the lens of the eye, skin, hands, and feet? | 50 mSv or 5 rem |
| What is the occupational dose limit of an embryo per month? | 0.5 mSv or 0.05 rem |
| What is the dose limit for the entire gestation for an occupational embryo? | 5 mSv or 0.5 rem |
| What is the SI unit for Roentgen (R)? | C/kg |
| What is the SI unit for Rad? | Gy |
| What is the SI unit for Rem? | Sv |
| What is the Si unit for Curie? | Bq |
Created by:
MariahKesterson
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