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






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






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






4. What is required for collection of input information?






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






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






7. What are devices that process information?






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






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






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






11. Fluoroscopic noise mostly comes from what?






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






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






14. Which type of information consists of operating instructions?






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






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






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






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






19. When detectors acquire their information through ____ they are receiving all the info at once.






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






21. Computer programs are called what?






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






23. What are the two ways detectors acquire information?






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






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






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






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






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






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






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






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






32. 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?






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






34. What are devices that process information?






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






36. What does DICOM stand for?






37. What is the 'noisiest' component of a digital system?






38. Computer programs are called what?






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






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






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






42. What are the two ways detectors acquire information?






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






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






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






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






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






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






49. When was ENIAC invented?






50. Computer equipment is called what?