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 name of the 'modern electronic computer'?






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






3. What does DICOM stand for?






4. Fluoroscopic noise mostly comes from what?






5. Computerized digital images are described in terms of what






6. 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?






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






8. 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?






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






10. A low contrast image has a ___ frequency.






11. Noise is ____ related to contrast.






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






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






14. Resolution is controlled by what?






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






16. What was the earliest computer device called?






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






18. What determines resolution?






19. 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?






20. Computer programs are called what?






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






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






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






24. 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.






25. 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.






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






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






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






29. Which type of information consists of collected facts?






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






31. 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?






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






33. Which type of information consists of collected facts?






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






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






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






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






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






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






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






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






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






43. Which type of information consists of operating instructions?






44. 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?






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






46. 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.






47. 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.






48. What is the name for a binary digit?






49. A larger matrix provides ____ pixels.






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