LRA 222 Week 2 Quiz

4. What is the relationship between kVp and subject contrast? A. high kVp creates low subject contrast B. low kVp creates low subject contrast C. high kVp creates high subject contrast D. kVp does not affect subject contrast

A. high kVp creates low subject contrast

10. Higher kVp results in less absorption and more variation in the intensities exiting the patient A. True B. False

B. False

8. Reducing the amount of scatter radiation reaching the IR results in A. lower radiographic contrast B. higher radiographic contrast C. improved spatial resolution D. reduced spatial resolution

B. higher radiographic contrast

6. To maintain the same exposure to the IR, if the SID is increased, the mAs must be A. decreased B. increased C. left the same D. doubled

B. increased

3. With digital imaging, if the mAs is too high A. the image brightness will appear low (dark) B. the image brightness will appear appropriate C. the image brightness will appear high (light) D. none of these

B. the image brightness will appear appropriate

1. Which of the following is not a primary exposure technique factor? A. KVP B. Time of exposure C. SID D. MA

C. SID

7. The device used to absorb scatter radiation in the radiation leaving the patient before it reaches the image receptor is the A. cassette B. flat panel detector C. grid D. filter

C. grid

2. Which of the following is true regarding the effect of mAs on the brightness of a digital image? A. doubling the mAs will increase brightness B. halving the mAs will decrease brightness C. mAs does not affect brightness in a digital image D. doubling the mAs will increase brightness and halving the mAs will decrease brightness

C. mAs does not affect brightness in a digital image

9. Which of the following statements is true regarding practices to minimize patient exposure? A. The beam should be open as large as the image receptor being used B. Grids should be used as much as possible to improve contrast C. Use more mAs in digital imaging because the brightness is computer adjusted and it reduces noise D. None of these

D. None of these

5. Using excessive kVp with a digital IR results in 1 increased IR exposure 2 increased scatter reaching the IR 3 decreased contrast A. increased IR exposure and increased scatter reaching the IR only B. increased IR exposure and decreased contrast only C. increased scatter reaching the IR and decreased contrast only D. increased IR exposure, increased scatter reaching the IR, and decreased contrast

D. increased IR exposure, increased scatter reaching the IR, and decreased contrast