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






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. A larger matrix provides ____ pixels.






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






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






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






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






8. Computers operate from ____ ____ language.






9. Which type of information consists of operating instructions?






10. What does DICOM stand for?






11. 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?






12. What are the two most common output devices?






13. What modalities are array processors useful for?






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






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






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






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






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






19. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






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






22. Which type of information consists of collected facts?






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






24. What is high-pass filtering also called?






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






26. Which computers handle data composed of continuously varying electrical currents?






27. Noise is measured as what?






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






29. Which type of information consists of collected facts?






30. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






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






32. What was the earliest computer device called?






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






34. Fluoroscopic noise mostly comes from what?






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






36. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






37. What is the name for a binary digit?






38. Resolution is controlled by what?






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






40. What type of scanning increases resolution but can't be used in real-time dynamic studies?






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






42. 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.






43. 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.






44. What are devices that process information?






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






46. Computers operate from ____ ____ language.






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






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






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






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







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