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. Computers operate from ____ ____ language.






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






3. Computerized digital images are described in terms of what






4. 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.






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






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






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






8. Which type of information consists of operating instructions?






9. Noise is ____ related to contrast.






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






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






12. What is the name for a binary digit?






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






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






15. Computers operate from ____ ____ language.






16. What does a 0 in binary code stand for?






17. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






18. Computer programs are called what?






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






20. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






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






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






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






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






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






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






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






28. What does a 0 in binary code stand for?






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






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






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






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






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






34. 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?






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






36. 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.






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






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






39. What determines resolution?






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






41. Window width and contrast have an ____ relationship.






42. What are the two most common output devices?






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






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






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






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






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






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






49. Computerized digital images are described in terms of what






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







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