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






2. What determines resolution?






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






4. A larger matrix provides ____ pixels.






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






6. 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?






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






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






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






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






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






12. What are the two ways detectors acquire information?






13. Resolution is controlled by what?






14. Fluoroscopic noise mostly comes from what?






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






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






17. Computers operate from ____ ____ language.






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






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






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






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






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






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






24. A larger matrix provides ____ pixels.






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






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






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






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






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






30. 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.






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






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






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






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






35. Which type of information consists of operating instructions?






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






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






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






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






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






41. Window width and contrast have an ____ relationship.






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






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






44. 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?






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






46. 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?






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






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






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






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