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 'noisiest' component of a digital system?






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






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






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






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






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






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






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






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






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






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






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






13. 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?






14. What determines resolution?






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






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






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






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






19. Fluoroscopic noise mostly comes from what?






20. 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.






21. A high contrast image has a ___ frequency.






22. Which type of information consists of collected facts?






23. Window width and contrast have an ____ relationship.






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






25. What modalities are array processors useful for?






26. What determines resolution?






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






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






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






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






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






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






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






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






35. Noise is ____ related to contrast.






36. 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.






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






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






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






40. What was the earliest computer device called?






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






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






43. 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?






44. A larger matrix provides ____ pixels.






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






46. Increased noise = _____ image contrast.






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






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






49. 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?






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







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