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 is the equation for determining gray scale bit depth?






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






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






4. What determines resolution?






5. What does DICOM stand for?






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






7. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






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






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






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






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






13. 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?






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






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






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






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






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






19. Noise is ____ related to contrast.






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






21. What are the two ways detectors acquire information?






22. Window width and contrast have an ____ relationship.






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






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






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






26. What is the name for a binary digit?






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






28. What changes the pixel value by multiplication or division and controls image contrast?






29. Which computers handle data composed of definite quantities of current?






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






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






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






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






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






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






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






37. When was ENIAC invented?






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






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






40. Computer equipment is called what?






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






42. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






43. What are the two most common output devices?






44. What are the two most common output devices?






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






46. Computers operate from ____ ____ language.






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






48. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






49. What changes the pixel value by addition or subtraction and controls image density?






50. 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.