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 are the two most common output devices?






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






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






4. 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?






5. 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?






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






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






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






9. What are the two types of information computers use?






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






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






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






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






14. What modalities are array processors useful for?






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






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






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






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






19. What changes the pixel value by addition or subtraction and controls image density?






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






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






22. What is required for collection of input information?






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






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






25. Noise is ____ related to contrast.






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






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






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






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






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






31. What are devices that process information?






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






33. The computer either ____ or ____ selected frequencies during the filtering process.






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






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






36. When was ENIAC invented?






37. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






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






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






41. What is the equation for determining gray scale bit depth?






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






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






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






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






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






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






48. 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.






49. 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?






50. What is critical to how fast the computer system can function?