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. A larger matrix provides ____ pixels.






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






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






4. What is the information stored as magnetic variations referred to as?






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






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






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






8. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






9. What changes the pixel value by multiplication or division and controls image contrast?






10. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






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






13. What are the two most common output devices?






14. What is high-pass filtering also called?






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






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






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






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






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






20. What are devices that process information?






21. What modalities are array processors useful for?






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






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






24. 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?






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






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






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






28. When was ENIAC invented?






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






30. Modalities differ in bit depth that is available depending on the capabilities of what?






31. What is the 'noisiest' component of a digital system?






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






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






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






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






36. The quality of the data acquired from the IR is measured by what three data characteristics?






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






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






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






40. Noise is measured as what?






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






42. 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.






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






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






45. What is the name for a binary digit?






46. What was the earliest computer device called?






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






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






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






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






Can you answer 50 questions in 15 minutes?



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