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 'noisiest' component of a digital system?






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






3. A high contrast image has a ___ frequency.






4. What modalities are array processors useful for?






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






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






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






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






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






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






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






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






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






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






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






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






17. Increased noise = _____ image contrast.






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






19. What does DICOM stand for?






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






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






22. 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?






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






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






25. What is the name for a binary digit?






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






27. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






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






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






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






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






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






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






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






37. What was the earliest computer device called?






38. Which type of information consists of operating instructions?






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






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






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






42. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






45. 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?






46. What is required for collection of input information?






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






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






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






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