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






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






3. What can memory be transferred as?






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






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






6. The quality of the data acquired from the IR is measured by what three data characteristics?






7. 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.






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






9. Noise is ____ related to contrast.






10. Computer equipment is called what?






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






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






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






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






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






16. When was ENIAC invented?






17. A low contrast image has a ___ frequency.






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






19. Computer programs are called what?






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






21. What was the earliest computer device called?






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






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






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






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






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






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






28. What modalities are array processors useful for?






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






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






31. Fluoroscopic noise mostly comes from what?






32. 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?






33. What are the two most common output devices?






34. Increased noise = _____ image contrast.






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






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






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






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






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






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






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






42. What determines resolution?






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






44. Which type of information consists of collected facts?






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






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






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






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






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






50. What are devices that process information?