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. Digitalization of analog information (increases / reduces) the quality and quantity of information?






2. Computers operate from ____ ____ language.






3. 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.






4. What modalities are array processors useful for?






5. If window width increases - image contrast will ____.






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






7. What are the two most common output devices?






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






9. What permit input/output of information to or from the CPU?






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






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






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






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






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






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






16. A high contrast image has a ___ frequency.






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






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






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






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






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






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






23. What are devices that process information?






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






25. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






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






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






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






30. What is the name for a binary digit?






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






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






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






34. What was the earliest computer device called?






35. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






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






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






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






40. What are devices that process information?






41. Window width and contrast have an ____ relationship.






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






43. 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.






44. Computer programs are called what?






45. Noise is ____ related to contrast.






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






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






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






49. If window width increases - image contrast will ____.






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






Can you answer 50 questions in 15 minutes?



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