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 a square series of boxes that gives form to the image?






2. Fluoroscopic noise mostly comes from what?






3. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






4. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






5. Resolution is controlled by what?






6. A larger matrix provides ____ pixels.






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






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






9. 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?






10. What determines resolution?






11. A low contrast image has a ___ frequency.






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






13. Noise is ____ related to contrast.






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






15. What does DICOM stand for?






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






17. Which memory can only be extracted without alteration; cannot change?






18. If window width increases - image contrast will ____.






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






20. Window width and contrast have an ____ relationship.






21. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






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






24. What are devices that process information?






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






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






27. A larger matrix provides ____ pixels.






28. 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?






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






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






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






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






33. 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?






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






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






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






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






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






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






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






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






42. 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?






43. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






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






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






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






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






49. Which type of information consists of operating instructions?






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