Test your basic knowledge |

Digital Image Processing

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. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






2. Noise is measured as what?






3. What are devices that process information?






4. Which type of information consists of collected facts?






5. What determines resolution?






6. Each pixel is capable of representing a wide range of what?






7. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






8. What is an image that has been converted into numerical values for transmission or processing?






9. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






10. When was ENIAC invented?






11. What are devices that process information?






12. The _____ the matrix size - the better the resolution.






13. Fluoroscopic noise mostly comes from what?






14. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






15. What provides specific instructions for calculations and sequential steps to be followed?






16. What type of scanning increases resolution but can't be used in real-time dynamic studies?






17. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






18. Medical imaging is often achieved from information that has been processed by what?






19. When detectors acquire their information through ____ they are receiving all the info at once.






20. If window width increases - image contrast will ____.






21. What is the 'noisiest' component of a digital system?






22. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






23. What permit input/output of information to or from the CPU?






24. A low contrast image has a ___ frequency.






25. Resolution is controlled by what?






26. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






27. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






28. What are the two most common output devices?






29. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






30. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






31. What is critical to how fast the computer system can function?






32. Noise is ____ related to contrast.






33. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






34. Increased noise = _____ image contrast.






35. What was the earliest computer device called?






36. What is high-pass filtering also called?






37. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






38. The number of shades of gray is determined by what?






39. What determines resolution?






40. What type of memory storage devices are required for large amounts of data?






41. In what time period did microchip technology come out?






42. Computer memory is often rated in terms of total ____ memory.






43. What provides specific instructions for calculations and sequential steps to be followed?






44. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






45. Who or What is responsible for density changes on a digital image? On a manual image






46. Noise is ____ related to contrast.






47. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






48. What does a 1 in binary code stand for?






49. Computer programs are called what?






50. What are the two ways detectors acquire information?