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. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






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






4. What are the two ways detectors acquire information?






5. A low contrast image has a ___ frequency.






6. What are the two most common output devices?






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






8. 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?






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






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






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






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






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






14. What are the two ways detectors acquire information?






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






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






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






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






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






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






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






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






23. 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.






24. What is required for collection of input information?






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






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






27. What is an individual matrix box or picture element?






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






29. What is the name for a binary digit?






30. What does DICOM stand for?






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






32. Computer equipment is called what?






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






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






35. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






36. What are devices that process information?






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






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






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






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






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






42. A larger matrix provides ____ pixels.






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






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






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






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






47. Window width and contrast have an ____ relationship.






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






49. What determines resolution?






50. A larger matrix provides ____ pixels.