Test your basic knowledge |

Digital Imaging Basics

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Improves visualization and spatial resolution






2. Registering the image to correct for patient motion






3. Located between the active and support layers if the IP that absorbs the stimulating light but reflects emitted light. (for newer plates)






4. What steps are included in 'readout processing






5. A very thin - tough - clear plastic that protects the phosphor layer






6. Prevents light from erasing data on the imaging plate or leaking through the backing - degreasing the spatial resolution.






7. Is erasing the plate signal






8. The greater the spatial image resolution.






9. Expands the digital grayscale to visible






10. A soft polymer that protects the back of the cassette.






11. 0.1 mR up to maximum of 100 mR






12. Registering the image to correct for patient motion






13. Defined as light produced by a phosphor (active layer) when struck by light or x-ray photons.






14. 2 eV - which is necessary to energize the trapped electrons.






15. The CR cassettes - phosphor plates - and CR reader.






16. Source of stimulating light - Scans an extracted IP with a helium laser beam or solid-state laser diodes - Beam is about 100 µm wide with a wavelength of 633 nm (or 670 to 690 nm






17. Sends light in a forward direction when released in the cassette reader - This layer may be black to reduce the spread of stimulating light and the escape of emitted light.






18. 2 eV - which is necessary to energize the trapped electrons.






19. Keeps the laser beam constant size - shape - speed and intensity






20. Grounds the plate to eliminate electrostatic problems and absorb light to increase sharpness






21. Filters the light before photodetection occurs






22. Barium fluorohalide bromides and iodides with europium activators (BaFBr:Eu and BaFI:Eu)






23. In what step is an amplifier used to match the PMT output signal to the ADC values?






24. What are the steps in Computed Radiography Image Processing?






25. Keeps the laser beam constant size - shape - speed and intensity






26. The material in this layer absorbs and reduces static electricity






27. Is erasing the plate signal






28. Sends light in a forward direction when released in the cassette reader - This layer may be black to reduce the spread of stimulating light and the escape of emitted light.






29. Detect (read) the stimulated emission






30. The greater the spatial image resolution.






31. In what steps is a blue-purple light emitted as the laser passes over the plate which is directly proportional to the x-ray energy absorbed in that specific area?






32. Cassette-based digital imaging is the digital acquisition modality that uses storage phosphor plates to produce projection images






33. Filters the light before photodetection occurs






34. Expands the digital grayscale to visible






35. Holds the Photostimulable phosphor (PSP) - which is the active component in the plate.






36. Improves image contrast






37. In what steps is a blue-purple light emitted as the laser passes over the plate which is directly proportional to the x-ray energy absorbed in that specific area?






38. Grounds the plate to eliminate electrostatic problems and absorb light to increase sharpness






39. Holds the Photostimulable phosphor (PSP) - which is the active component in the plate.






40. Number related to the amount of amplification required by the PM tube to adjust the digital image.






41. The material in this layer absorbs and reduces static electricity






42. Receives light from the fiber optic collection assembly - and transmits a time-varying analog signal to a computer system






43. Source of stimulating light - Scans an extracted IP with a helium laser beam or solid-state laser diodes - Beam is about 100 µm wide with a wavelength of 633 nm (or 670 to 690 nm






44. Detect (read) the stimulated emission






45. Labeling the image






46. What does pixel size determine






47. Performed to optimize the appearance of the image for purpose of better detecting pathology






48. Located between the active and support layers if the IP that absorbs the stimulating light but reflects emitted light. (for newer plates)






49. Emitted light from the IP is channeled into a funnel like fiber optic collection assembly and is directed at the photodetector - photomultiplier tube (PMT) photodiode (PD) or charge-coupled device (CCD






50. In what step is an amplifier used to match the PMT output signal to the ADC values?