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






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






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






4. What does DICOM stand for?






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






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






7. When was ENIAC invented?






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






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






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






11. What are the two most common output devices?






12. What is a square series of boxes that gives form to the image?






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






14. What permit input/output of information to or from the CPU?






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






16. What are devices that process information?






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






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






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






20. Computers operate from ____ ____ language.






21. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






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






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






24. A low contrast image has a ___ frequency.






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






26. Computer equipment is called what?






27. Digitalization of analog information (increases / reduces) the quality and quantity of information?






28. Digitalization of analog information (increases / reduces) the quality and quantity of information?






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






30. What can memory be transferred as?






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






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






33. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






34. Which type of information consists of operating instructions?






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






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






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






38. When was ENIAC invented?






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






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






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






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






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






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






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






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






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






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






49. What modalities are array processors useful for?






50. Fluoroscopic noise mostly comes from what?