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






2. What was the earliest computer device called?






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






4. Fluoroscopic noise mostly comes from what?






5. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






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






7. When subject contrast is high - the acquired data contrast will be ____.






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






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






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






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






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






13. Digitalization of analog information (increases / reduces) the quality and quantity of information?






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






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






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






17. What can memory be transferred as?






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






19. What is the 'heart' of every computer?






20. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






21. What are devices that process information?






22. What is the mathematical algorithm used to create all medical images?






23. What determines resolution?






24. Computerized digital images are described in terms of what






25. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






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






27. What are the two types of information computers use?






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






29. Which computers handle data composed of continuously varying electrical currents?






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






31. A low contrast image has a ___ frequency.






32. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






34. 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?






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






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






37. Computer equipment is called what?






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






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






40. Increased noise = _____ image contrast.






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






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






43. 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?






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






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






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






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






48. What is an individual matrix box or picture element?






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






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