| Question | Answer |
| What percentage of public exposure to ionizing radiation is from medical sources? | 50%
Lange Q&A pg. 125 |
| What cell type has the greatest radiosensitivity in the adult human body? | Lymphocytes
Lange Q&A pg. 125 |
| The unit used to express kinetic energy released in matter? | Kerma
Lange Q&A pg. 126 |
| What is the established annual occupational dose-equivalent limit for the lens of the eye? | 150 mSv
Lange Q&A pg. 126 |
| Occupational radiation monitoring is required when it is possible that the individual might receive more than how much radiation? | 1/10 of the annual dose limit
Lange Q&A pg. 126 |
| Irradiation of water molecules within the body and their resulting breakdown is termed? | Radiolysis
Lange Q&A pg. 126 |
| The x-ray interaction with matter that is responsible for the majority of scattered radiation reaching the image receptor is what type? | Compton scatter
Lange Q&A pg. 127 |
| Each time an x-ray beam scatters, its intensity at 1 m from the scattering object is what fraction of its original intensity? | 1/1,000
Lange Q&A pg. 127 |
| The most radiosensitive portion of the GI tract is what? | Small bowel
Lange Q&A pg. 129 |
| The annual dose limit for occupationally exposed individuals is valid for what types of radiation? | Beta, x-rays, and gamma radiations
Lange Q&A pg. 129 |
| What unit of measure is used to express ionizing radiation dose to biologic material? | Rem (Sv)
Lange Q&A pg. 130 |
| What is the term used to describe x-ray photon interaction with matter and the transference of part of the photon's energy to matter? | Scattering
Lange Q&A pg. 129 |
| The reduction in the intensity of an x-ray beam as it passes through material is termed? | Attenuation
Lange Q&A pg. 130 |
| What type of dose-response relationship represents radiation-induced leukemia and genetic effects? | Linear, nonthreshold
Lange Q&A pg. 131 |
| A dose of 25 rad to the fetus during the seventh or eighth week of pregnancy is likely to cause what? | Neurologic anomalies
Lange Q&A pg. 131 |
| Late effects of radiation, whose incidence is dose related and for which there is no threshold dose, are referred to as? | Stochastic/probabilistic
Lange Q&A pg. 131 |
| According to NCRP regulations, leakage radiation from the x-ray tube must not exceed what? | 100 mR/h
Lange Q&A pg. 131 |
| According to the NCRP, the annual occupational dose-equivalent limit (50 rem) to the thyroid, skin, and extremities is equal to how many mSv? | 500
Lange Q&A pg. 132 |
| The amount of time that x-rays are being produced and directed toward a particular wall is referred to as the what? | Use factor
Lange Q&A pg. 133 |
| The SSD in mobile fluoroscopy must be at least how far? | A minimum of 12 inches
Lange Q&A pg. 135 |
| The automatic exposure device that is located immediately under the x-ray table is the? | Ionization chamber
Lange Q&A pg. 135 |
| What is the effect on RBE as LET increases? | As LET increases, RBE increases.
Lange Q&A pg. 135 |
| An optically stimulated luminescence dosimeter contains what type of detector? | Aluminum oxide
Lange Q&A pg. 136 |
| The photoelectric effect is an interaction between an x-ray photon and what? | Inner shell electron
Lange Q&A pg. 136 |
| Filters used in radiographic x-ray tubes generally are composed of what? | Aluminum
Lange Q&A pg. 136 |
| Primary radiation barriers must be at least how high? | 7 feet
Lange Q&A pg. 137 |
