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 does DICOM stand for?






2. Resolution is controlled by what?






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






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






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






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






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






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






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






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






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






12. What was the earliest computer device called?






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






14. 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.






15. What was the earliest computer device called?






16. What is the measure of the differences between the data values referred to as?






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






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






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






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






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






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






23. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






24. What is a square series of boxes that gives form to the image?






25. 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?






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






27. A high S/N indicates ___ noise in the image.






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






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






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






31. 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?






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






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






34. A high contrast image has a ___ frequency.






35. What can memory be transferred as?






36. What is a square series of boxes that gives form to the image?






37. Window width and contrast have an ____ relationship.






38. A high S/N indicates ___ noise in the image.






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






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






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






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






43. What determines resolution?






44. When was ENIAC invented?






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






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






47. 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.






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






49. Fluoroscopic noise mostly comes from what?






50. What modalities are array processors useful for?