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 information stored as magnetic variations referred to as?






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






4. What does DICOM stand for?






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






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






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






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






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






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






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






12. What is required for collection of input information?






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






14. Which type of information consists of operating instructions?






15. What does DICOM stand for?






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






17. When was ENIAC invented?






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






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






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






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






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






23. 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?






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






25. Increased noise = _____ image contrast.






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






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






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






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






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






31. Noise is ____ related to contrast.






32. Fluoroscopic noise mostly comes from what?






33. Digitalization of analog information (increases / reduces) the quality and quantity of information?






34. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






35. 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?






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






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






38. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






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






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






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






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






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






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






45. What is critical to how fast the computer system can function?






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






47. 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?






48. What determines resolution?






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






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