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






2. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






4. Window width and contrast have an ____ relationship.






5. Computerized digital images are described in terms of what






6. The ____ is the heart of the computer while the ___ is the vessels.






7. Resolution is controlled by what?






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






9. What is the measure of the differences between the data values referred to as?






10. 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.






11. 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?






12. What is the name for a binary digit?






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






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






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






16. A high S/N indicates ___ noise in the image.






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






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






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






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






21. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






22. What does a 0 in binary code stand for?






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






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






25. Computer equipment is called what?






26. In what time period did mathematical theory and solid-state electronics come out?






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






28. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






29. What is the information stored as magnetic variations referred to as?






30. Which computers handle data composed of definite quantities of current?






31. What determines resolution?






32. What are the two ways detectors acquire information?






33. What is high-pass filtering also called?






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






35. 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?






36. What are the two ways detectors acquire information?






37. What can memory be transferred as?






38. 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?






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






40. Which memory can only be extracted without alteration; cannot change?






41. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






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






44. Fluoroscopic noise mostly comes from what?






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






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






47. What is the name of the 'modern electronic computer'?






48. 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?






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






50. Digital detectors are capable of producing ______ shades of gray.