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






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






3. Noise is measured as what?






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






5. 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?






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






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






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






9. 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?






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






11. Fluoroscopic noise mostly comes from what?






12. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






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






14. Computerized digital images are described in terms of what






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






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






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






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






19. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






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






21. 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?






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






23. Computer programs are called what?






24. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






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






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






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






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






29. A __ _____ disk will store over 10000000 bytes of information.






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






31. What is the 'noisiest' component of a digital system?






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






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






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






35. 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?






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






37. What is high-pass filtering also called?






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






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






40. Computer equipment is called what?






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






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






43. What is high-pass filtering also called?






44. Which type of information consists of operating instructions?






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






46. A larger matrix provides ____ pixels.






47. Which memory replaces new information with the old; can change?






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






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






50. What are the two most common output devices?