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. A larger matrix provides ____ pixels.






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






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






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






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






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






7. 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.






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






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






10. What are the two most common output devices?






11. 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?






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






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






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






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






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






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






18. 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?






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






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






21. What modalities are array processors useful for?






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






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






24. Changes in window width are sometimes called gray scale ____ or ____.






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






26. 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?






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






28. Computer equipment is called what?






29. Which type of information consists of collected facts?






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






31. Noise is measured as what?






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






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






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






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






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






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






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






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






40. Computerized digital images are described in terms of what






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






42. 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.






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






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






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






46. 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.






47. The human visual range is ___ or fewer shades of gray.






48. Fluoroscopic noise mostly comes from what?






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






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