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 a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






2. Resolution is controlled by what?






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






4. All medical imaging is achieved with which type of computers?






5. 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.






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






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






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






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






10. 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.






11. Noise is measured as what?






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






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






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






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






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






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






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






19. Fluoroscopic noise mostly comes from what?






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






21. A low contrast image has a ___ frequency.






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






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






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






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






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






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






28. 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?






29. 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?






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






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






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






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






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






35. What modalities are array processors useful for?






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






37. What is the primary limitation with the resolution on digital images?






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






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






41. What is the primary limitation with the resolution on digital images?






42. When was ENIAC invented?






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






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






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






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






47. Which type of information consists of collected facts?






48. Which type of information consists of operating instructions?






49. What directs information to and from various parts of the computer?






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






Can you answer 50 questions in 15 minutes?



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