Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






2. 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.






3. What was the earliest computer device called?






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






5. What determines resolution?






6. A low contrast image has a ___ frequency.






7. Increased noise = _____ image contrast.






8. 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?






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






10. 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.






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






12. What can memory be transferred as?






13. 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?






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






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






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






17. 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?






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






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






20. 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?






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






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






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






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






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






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






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






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






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






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






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






32. When was ENIAC invented?






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






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






35. 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.






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






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






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






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






40. The _____ the matrix size - the better the resolution.






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






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






43. 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?






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






45. Changes in window width are sometimes called gray scale ____ or ____.






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






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






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






49. Changes in window width are sometimes called gray scale ____ or ____.






50. Increased noise = _____ image contrast.







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