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






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






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






4. What is the name of the 'modern electronic computer'?






5. What are the two most common output devices?






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






7. A larger matrix provides ____ pixels.






8. Fluoroscopic noise mostly comes from what?






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






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






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






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






13. 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.






14. Noise is measured as what?






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






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






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






18. Which type of information consists of collected facts?






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






20. What determines resolution?






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






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






23. What does DICOM stand for?






24. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






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






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






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






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






29. 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?






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






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






32. Which computers handle data composed of continuously varying electrical currents?






33. Noise is ____ related to contrast.






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






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






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






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






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






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






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






41. Which type of information consists of operating instructions?






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






43. What is the 'heart' of every computer?






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






45. Computerized digital images are described in terms of what






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






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






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






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






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