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. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






3. 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?






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






5. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






6. Noise is ____ related to contrast.






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






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






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






10. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






12. Computerized digital images are described in terms of what






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






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






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






16. Computer programs are called what?






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






18. 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?






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






20. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






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






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






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






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






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






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






28. 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.






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






30. A high contrast image has a ___ frequency.






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






32. What determines resolution?






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






34. What are devices that process information?






35. Window width and contrast have an ____ relationship.






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






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






38. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






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






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






41. What modalities are array processors useful for?






42. Window width and contrast have an ____ relationship.






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






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






45. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






47. The quality of the data acquired from the IR is measured by what three data characteristics?






48. What can memory be transferred as?






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






50. Fluoroscopic noise mostly comes from what?