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. 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.






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






3. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.






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






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






6. 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?






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






8. 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.






9. What is a square series of boxes that gives form to the image?






10. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






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






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






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






14. What determines resolution?






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






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






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






18. Which type of information consists of operating instructions?






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






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






21. 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?






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






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






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






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






26. What is a square series of boxes that gives form to the image?






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






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






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






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






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






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






33. What are devices that process information?






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






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






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






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






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






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






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






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






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






43. Increased noise = _____ image contrast.






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






45. Fluoroscopic noise mostly comes from what?






46. When was ENIAC invented?






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






48. Computer equipment is called what?






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






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






Can you answer 50 questions in 15 minutes?



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