CHAPTER 5 RADIOGRAPHIC IMAGING AND EXPOSURE EXAM QUESTIONS AND ANSWERS

CHAPTER 5 RADIOGRAPHIC IMAGING AND EXPOSURE EXAM QUESTIONS AND ANSWERS Which of the following is defined as a graphic representation of the pixel value? a) Automatic rescaling b) Value of interest c) Histogram d) Exposure indicator - Answer- Histogram What process is employed to maintain consistent digital image brightness for over or underexposure? a) automatic rescaling b) Histogram c)exposure indicator d) LUTs - Answer- automatic rescaling Which of the following is not a numerical value indicating the level of radiation exposure to a digital image receptor (IR)? a) sensitivity number b) exposure indicator c) window level d) exposure index - Answer- Window level Which of the following may impact the location and shape of the histogram? 1) exposure technique 2) Positioning 3) collimation a) 1 n 2 b) 1 n 3 c) 2 n 3 d) 1,2, n 3 - Answer- 1, 2 n 3 What digital process alters image brightness and grayscale to improve the visibility of anatomic structures? a) automatic rescaling