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 primary limitation with the resolution on digital images?






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






3. What are the two ways detectors acquire information?






4. What is the name for a binary digit?






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






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






7. The quality of the data acquired from the IR is measured by what three data characteristics?






8. Noise is ____ related to contrast.






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






10. What does DICOM stand for?






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






12. 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.






13. 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.






14. A low contrast image has a ___ frequency.






15. Increased noise = _____ image contrast.






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






17. Noise is measured as what?






18. Which type of information consists of collected facts?






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






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






21. What is required for collection of input information?






22. The computer either ____ or ____ selected frequencies during the filtering process.






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






24. What is the raw data to which a Fourier Transformation is applied to create the digital image?






25. Fluoroscopic noise mostly comes from what?






26. What is the equation for determining gray scale bit depth?






27. Which type of information consists of operating instructions?






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






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






31. 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.






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






33. What is the frequency response of the incoming signal called?






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






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






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






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






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






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






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






41. The computer either ____ or ____ selected frequencies during the filtering process.






42. 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?






43. What is high-pass filtering also called?






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






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






46. Resolution is controlled by what?






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






48. When was ENIAC invented?






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






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