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RADT456:Rad.Protecti
ARRT Registry Review
| Question | Answer |
|---|---|
| The monthly gestational dose-equivalent limit for embryo/fetus of a pregnant radiographer is what? | 5 mSv (pg. 135) |
| What cell type has the greatest radio sensitivity in the adult human? | Lymphocytes (pg. 136) |
| What is the established annual occupational dose-equivalent limit for the lens of the eye? | 150 mSv (pg. 136) |
| What is radiolysis? | Irradiation of water molecules within the body and their resulting breakdown. (pg. 136) |
| What contributes most to occupational exposure? | Compton Scatter (pg. 137) |
| Compton Scatter is defined as? | An x-ray interaction with matter that is responsible for the majority of scatter radiation reaching the image receptor. (pg. 137) |
| According to the NCRP, the annual occupational whole-body dose-equivalent limit is what? | 50 mSv (pg. 137) |
| What is recommended for a pregnant radiographer? | Wear a second dosimeter under the lead apron. (pg. 138) |
| Medical and dental radiation accounts for what percentage of the general public's exposure to human-made radiation? | 90% (pg. 138) |
| How does filtration affect the primary beam? | It increases the average energy of the primary beam. (pg. 139) |
| What is the minimum lead requirement for lead aprons, according to the NCRP? | .50 mm Pb (pg. 139) |
| Immature cells are referred to as what? | Undifferentiated and Stem Cells (pg. 139) |
| Define Scattering | Term used to describe x-ray photon interaction with matter and the transference of part of the photons energy to matter (pg. 139) |
| Primary radiation barriers must be at least how high? | 7 ft. (pg. 139) |
| The annual dose limit for occupationally exposed individuals is valid for what? | Beta, x- and gamma radiations (pg. 139) |
| Patient dose increases as fluoroscopic what decreases? | FOV (pg. 140) |
| What unit of measure is used to express ionizing radiation dose to biologic material? | Rem (Sv) (pg. 140) |
| What is epilation? | the skin response to radiation exposure that appears as hair loss. (pg. 140) |
| What is attenuation? | the reduction in the intensity of an x-ray beam as it passes through a material. (pg. 140) |
| The largest amount of diagnostic x-ray absorption is most likely to occur in which of the following tissues? | Bone (pg. 141) |
| Diagnostic x-radiation may be correctly described as what kind of energy and LET? | low energy and low LET (pg. 142) |
| The photoelectric effect is an interaction between an x-ray photon and what? | An inner-shell electron (pg. 146) |
| Filters used in radiographic x-ray tubes general are composed of what? | Aluminum (pg. 146) |
| What type of cells are the most radiosensitive? | Erythroblasts (pg. 149) |
| The term effective dose refers to what? | Whole-Body Dose (pg. 150) |
| To within what percentage of the SID must the collimator light and actual irradiated area be accurate? | 2% (pg. 154) |
| What is Roentgen? | units that measure radiation output from a diagnostic x-ray tube. (pg. 156) |
| The target theory applies to what? | DNA molecules (pg. 157) |
Created by:
arsturgill
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