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 is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






2. All medical imaging is achieved with which type of computers?






3. Fluoroscopic noise mostly comes from what?






4. What input device do radiographers use on a normal basis?






5. What is the name for a binary digit?






6. Resolution is controlled by what?






7. What changes the pixel value by addition or subtraction and controls image density?






8. Computerized digital images are described in terms of what






9. There is a ___ relationship between subject contrast and acquired data contrast.






10. What is the primary limitation with the resolution on digital images?






11. Modalities differ in bit depth that is available depending on the capabilities of what?






12. If the window level increases - density will _____.






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






14. When detectors acquire their information by ____ they are receiving info from a specific area.






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






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






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






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






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






20. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






21. Noise is ____ related to contrast.






22. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






23. What is the random background information that does not contribute to the image quality?






24. What are the 3 classifications of digitized image filters?






25. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.






26. What directs information to and from various parts of the computer?






27. A __ _____ disk will store over 10000000 bytes of information.






28. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






29. What is a square series of boxes that gives form to the image?






30. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






31. 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?






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






33. What are devices that process information?






34. A __ _____ disk will store over 10000000 bytes of information.






35. Which memory replaces new information with the old; can change?






36. Which type of information consists of operating instructions?






37. What are the two ways detectors acquire information?






38. Window width and contrast have an ____ relationship.






39. Computer equipment is called what?






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






41. What changes the pixel value by multiplication or division and controls image contrast?






42. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






43. Which type of information consists of operating instructions?






44. Which type of information consists of collected facts?






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






46. The human visual range is ___ or fewer shades of gray.






47. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






48. What determines resolution?






49. Around what time did digital computerization come out for CT and US?






50. What was the earliest computer device called?