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 memory storage devices are required for large amounts of data?






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






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






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






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






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






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






8. 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?






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






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






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






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






13. 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.






14. A larger matrix provides ____ pixels.






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






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






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






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






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






20. What is the name for a binary digit?






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






22. Computers operate from ____ ____ language.






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






24. When was ENIAC invented?






25. Which type of information consists of operating instructions?






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






27. What does DICOM stand for?






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






29. What modalities are array processors useful for?






30. 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.






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






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






33. 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.






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






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






36. What is the primary limitation with the resolution on digital images?






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






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






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






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






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






42. What are the two ways detectors acquire information?






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






44. Increased noise = _____ image contrast.






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






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






47. Fluoroscopic noise mostly comes from what?






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






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






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