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






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






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






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






5. Noise is measured as what?






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






7. Resolution is controlled by what?






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






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






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






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






12. Computer equipment is called what?






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






14. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






15. Which type of information consists of collected facts?






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






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






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






19. When was ENIAC invented?






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






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






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






23. Who or What is responsible for density changes on a digital image? On a manual image






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






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






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






27. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






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






30. Around what time did digital computerization come out for CT and US?






31. What are devices that process information?






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






33. Around what time did digital computerization come out for CT and US?






34. Window width and contrast have an ____ relationship.






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






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






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






38. What 3 things were required prior to digital computer applications in medical imaging?






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






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






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






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






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






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






45. 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?






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






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






48. What does DICOM stand for?






49. What determines resolution?






50. Noise is ____ related to contrast.






Can you answer 50 questions in 15 minutes?



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