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






2. What is high-pass filtering also called?






3. 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?






4. What are devices that process information?






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






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






7. The computer either ____ or ____ selected frequencies during the filtering process.






8. What is high-pass filtering also called?






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






10. What determines resolution?






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






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






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






14. What are the two ways detectors acquire information?






15. When was ENIAC invented?






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






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






18. Increased noise = _____ image contrast.






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






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






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






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






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






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






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






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






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






28. Computer equipment is called what?






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






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






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






32. What was the earliest computer device called?






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






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






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






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






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






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






39. Noise is measured as what?






40. Computers operate from ____ ____ language.






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






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






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






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






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






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






47. Which type of information consists of collected facts?






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






49. 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?






50. What are the two most common output devices?