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






2. Window width and contrast have an ____ relationship.






3. 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?






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






5. Computer equipment is called what?






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






7. What determines resolution?






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






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






10. 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?






11. What are the two most common output devices?






12. 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?






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






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






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






16. Resolution is controlled by what?






17. A high contrast image has a ___ frequency.






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






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






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






21. What are the two ways detectors acquire information?






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






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






24. 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?






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






26. 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?






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






28. What is the name for an 8-bit word?






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






30. 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?






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






32. A larger matrix provides ____ pixels.






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






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






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






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






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






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






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






40. Fluoroscopic noise mostly comes from what?






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






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






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






44. What are the two ways detectors acquire information?






45. Increased noise = _____ image contrast.






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






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






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






49. What can memory be transferred as?






50. What are devices that process information?







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