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 directs information to and from various parts of the computer?






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






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






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






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






6. Window width and contrast have an ____ relationship.






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






8. Noise is measured as what?






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






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






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






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






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






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






15. What 3 things were required prior to digital computer applications in medical imaging?






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






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






18. What are the two ways detectors acquire information?






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






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






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






22. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






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






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






25. Increased noise = _____ image contrast.






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






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






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






29. A high contrast image has a ___ frequency.






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






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






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






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






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






35. Binary systems operate with a ___-symbol language.






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






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






38. 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.






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






40. Which type of information consists of collected facts?






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






42. What is the name for a binary digit?






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






44. What are devices that process information?






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






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






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






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






49. What determines resolution?






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