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






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






3. A __ _____ disk will store over 10000000 bytes of information.






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






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






6. A larger matrix provides ____ pixels.






7. What was the earliest computer device called?






8. What modalities are array processors useful for?






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






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






11. Increased noise = _____ image contrast.






12. What are devices that process information?






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






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






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






16. 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?






17. Window width and contrast have an ____ relationship.






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






19. 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?






20. What can memory be transferred as?






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






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






23. Around what time did digital computerization come out for CT and US?






24. Around what time did digital computerization come out for CT and US?






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






26. What is required for collection of input information?






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






28. Noise is ____ related to contrast.






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






30. 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?






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. Which type of information consists of operating instructions?






33. Computer equipment is called what?






34. What is required for collection of input information?






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






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






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






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






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






40. Noise is measured as what?






41. Noise is measured as what?






42. Computer equipment is called what?






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






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






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






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






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






48. 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?






49. Resolution is controlled by what?






50. What is the name for a binary digit?