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






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






3. 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?






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






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






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






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






8. 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?






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






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






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






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






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






14. 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?






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






16. A low contrast image has a ___ frequency.






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






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






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






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






21. Window width and contrast have an ____ relationship.






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






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






24. What changes the pixel value by multiplication or division and controls image contrast?






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






26. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






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






29. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






30. What are devices that process information?






31. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






32. 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?






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






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






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






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






37. The _____ the matrix size - the better the resolution.






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






39. Computers operate from ____ ____ language.






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






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






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






43. 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?






44. 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?






45. What is required for collection of input information?






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






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






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






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






50. Fluoroscopic noise mostly comes from what?