Quality Resource Guide l Digital Radiography 7th Edition 7 www.metdental.com POST-TEST Internet Users: This page is intended to assist you in fast and accurate testing when completing the “Online Exam.” We suggest reviewing the questions and then circling your answers on this page prior to completing the online exam. (1.0 CE Credit Contact Hour) Please circle the correct answer. 70% equals passing grade. 1. The diagnostic accuracy of digital imaging systems compared to conventional film-based radiography is: a. Worse b. About the same c. Better d. Not comparable 2. How many shades of gray does a 12-bit image contain? a. 256 b. 1024 c. 4096 d. 16384 3. Which statement is TRUE regarding intraoral solid-state detectors? a. They can be sterilized if contaminated. b. They are thicker than film or photostimulable phosphor (PSP) plates. c. The dimension of the active area is much smaller than film. d. They are inexpensive to replace. 4. Image acquisition time of a cephalometric radiograph with a CCD detector is the same as with film. a. True b. False 5. Which surface is sometimes difficult to image with a solid-state detector? a. Distal surface of the second premolar in the molar periapical radiograph. b. Distal surface of the canine in the premolar periapical radiograph. c. Mesial surface of the first molar in the premolar periapical radiograph. d. Mesial surface of the canine in the incisor periapical radiograph. 6. Which of the following is an advantage of photostimulable phosphor (PSP) plates relative to solid- state detectors (CCD/ CMOS)? a. The images appear on the screen almost instantaneously b. There is no need for exposure tables or preset buttons. c. PSP plates are thinner and slightly flexible. d. PSP images can be enhanced once they have been captured. 7. Which of the following statements is TRUE regarding photostimulable phosphor (PSP) plates? a. They cannot be reused. b. They should be exposed to bright light before scanning. c. They should be shielded from bright light before scanning. d. Scanning erases all of the latent image. 8. An underexposed PSP plate results in an image with a. Low brightness b. High brightness c. Low noise d. High noise 9. Which of the following is the best safeguard for identifying a PSP plate that has been exposed backward? a. A radiopaque marker on the front of the plate b. A radiopaque marker on the back of the plate c. A radiolucent marker on the front of the plate d. A radiolucent marker on the back of the plate 10. Which of the following represents best practice for monitoring the quality of the imaging system? a. Exposure of a dedicated quality control phantom at set-up b. Exposure of a dedicated quality control phantom at regular intervals c. Subjective assessment of image quality at set-up d. Subjective assessment of image quality at regular intervals