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






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






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






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






5. What is an image that has been converted into numerical values for transmission or processing?






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






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






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






9. 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.






10. Medical imaging is often achieved from information that has been processed by what?






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






12. What was the earliest computer device called?






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






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






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






16. What is the raw data to which a Fourier Transformation is applied to create the digital image?






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






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






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






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






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






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






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






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






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






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






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






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






29. What are devices that process information?






30. 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.






31. What are the 3 classifications of digitized image filters?






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






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






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






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






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






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






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






39. Noise is ____ related to contrast.






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






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






42. What are the two ways detectors acquire information?






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






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






45. What modalities are array processors useful for?






46. What is the raw data to which a Fourier Transformation is applied to create the digital image?






47. Which type of information consists of collected facts?






48. 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?






49. Increased noise = _____ image contrast.






50. A high contrast image has a ___ frequency.