Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 a square series of boxes that gives form to the image?






2. 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.






3. Noise is ____ related to contrast.






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






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






6. What is the name for a binary digit?






7. Resolution is controlled by what?






8. What are devices that process information?






9. Increased noise = _____ image contrast.






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






11. A high S/N indicates ___ noise in the image.






12. What does DICOM stand for?






13. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






14. 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?






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






16. 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?






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






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






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






20. What is required for collection of input information?






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






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






23. Which type of information consists of operating instructions?






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






25. Fluoroscopic noise mostly comes from what?






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






27. Computerized digital images are described in terms of what






28. What determines resolution?






29. Fluoroscopic noise mostly comes from what?






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






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






32. A larger matrix provides ____ pixels.






33. What are the two ways detectors acquire information?






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






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






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






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






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






39. Which type of information consists of collected facts?






40. What are devices that process information?






41. Increased noise = _____ image contrast.






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






43. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






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






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






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






47. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






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






49. 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?






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







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