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






2. What determines resolution?






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






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






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






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






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






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






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






10. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






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






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






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






14. 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.






15. Noise is ____ related to contrast.






16. What are the two most common output devices?






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






18. What input device do radiographers use on a normal basis?






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






20. What is required for collection of input information?






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






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






23. 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?






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






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






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






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






28. Which type of information consists of operating instructions?






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






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






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






32. Computer equipment is called what?






33. What is high-pass filtering also called?






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






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






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






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






38. What are the two ways detectors acquire information?






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






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






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






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






43. Noise is ____ related to contrast.






44. 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.






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






46. What modalities are array processors useful for?






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






48. A high contrast image has a ___ frequency.






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






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