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






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






3. What are devices that process information?






4. Noise is measured as what?






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






6. What determines resolution?






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






8. What determines resolution?






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






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. Computers operate from ____ ____ language.






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






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






14. What is required for collection of input information?






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






16. 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?






17. What are the two ways detectors acquire information?






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






19. What is the frequency response of the incoming signal called?






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






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






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






23. What is the name for a binary digit?






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






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






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






27. Noise is measured as what?






28. 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.






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






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






31. 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.






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






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






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






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






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






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






38. A low contrast image has a ___ frequency.






39. What are the 3 classifications of digitized image filters?






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






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






42. Fluoroscopic noise mostly comes from what?






43. What is the name for a binary digit?






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






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






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






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






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






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






50. 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?







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