- The dose rate at the table top during fluoroscopy cannot exceed _______ R per minute.A. 2B. 5C. 7D. 10
- what is the unit for air kerma 1. brem 2. collision kerma3. roentgen 4. gray
- How will beam filtration effect the primary beam?A. Make it more homogeneousB. Make it more heterogeneousC. Make it less penetratingD. Reduce its quality
- to prevent leakage radiation from exposing the patient, an x-ray tube needs how much protective lead 1. 1.5 mm 2. 2.5 mm3. 3.5 mm4. 4.5 mm
- According to 21 CFR, which of the following is/are true concerning fluoroscopic equipment manufactured after June 10, 2006?A. Air kerma rate (AKR) must be updated every 1 secondB. Cumulative air kerma must be updated every 5 secondsC. Irradiation time must be updated every 6 secondsD. All of the above
- Which of the following types of beam restricting devices is considered the best at reducing patient exposure?A. ConeB. DiaphragmC. CollimatorD. Extension cylinder
- Which of the following is NOT an important factor when attempting to reduce patient exposure?A. Use highest possible mAsB. Use close collimationC. Use gonadal shieldingD. Use well calibrated equipment
- which of the following types of equipment has a great effect on reducing population exposure 1. fluoroscopic devices2. tomographic machines 3. automatic exposure controls (AEC) 4. computerized tomography equipment
- Which of the following could result from excessive radiation exposure to a fetus during the first trimester?1. Prenatal death2. Neonatal death3. Congenital abnormalities4. All of the above
- Which of the following are reasons for using beam restricting devices?1. Reduce scatter radiation2. Reduce patient exposure3. Improve image contrast4. All of the above
- X rays that are not in the primary beam are called
- which of the following methods is used to determine if an x-ray tube has adequate filtration 1. read tube specifications 2. physical examination of the tube 3. visual inspection of the tube 4. half-value layer (HVL) measurement
- the source to skin distance for stationary fluoroscopy must not be less than 1. 5"2. 15"3. 20"4. 40"
- which test is test the accepted method for determining beam filtration
- What is the effective dose limit a radiography student may receive in one year if he/she is under 18 years old?A. 1 mSv (.1 rem)B. 5 mSv (.5 rem)C. 10 mSv (1 rem)D. 50 mSv (5 rem)
- Which of the following is the best protection from radiation?A. DistanceB. Lead glassC. Lead shieldD. Lead apron
- Radiation that leaves the tube housing by any means other than through the window is called what?A. PrimaryB. ScatterC. LeakageD. Remnant (exit)
- Leakage radiation from the x-ray tube cannot exceed which of the following at a distance of one meter?A. 6.45 x 10-6 Coulomb/kg/hr (25 mR/hr)B. 1.29 x 10-5 Coulomb/kg/hr (50 mR/hr)C. 1.94 x 10-5 Coulomb/kg/hr (75 mR/hr)D. 2.58 x 10-5 Coulomb/kg/hr (100 mR/hr)
- Which of the following is a primary factor in protecting radiographers from scatter radiation?A. Increase kVpB. Reduce focal spot sizeC. Use some type of lead shieldingD. Reduce screen speed
- Radiation that changes direction as it passes through a material is called what?A. SecondaryB. ScatterC. LeakageD. Remnant (exit)