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 modalities are array processors useful for?






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






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






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






5. Which type of information consists of collected facts?






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






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






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






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






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






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






12. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






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






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






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






18. What is the name for a binary digit?






19. Which type of information consists of collected facts?






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






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






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






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






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






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






26. What is high-pass filtering also called?






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






28. 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.






29. 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?






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






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






32. 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?






33. A low contrast image has a ___ frequency.






34. Computer programs are called what?






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






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






37. Computerized digital images are described in terms of what






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






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






40. Window width and contrast have an ____ relationship.






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






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






43. What is the name for a binary digit?






44. What are the two most common output devices?






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






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






47. What is the random background information that does not contribute to the image quality?






48. What was the earliest computer device called?






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






50. Noise is ____ related to contrast.







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