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 is the frequency response of the incoming signal called?






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






3. When was ENIAC invented?






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






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






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






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






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






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






10. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






11. Which type of information consists of collected facts?






12. What is critical to how fast the computer system can function?






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






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






15. Noise is ____ related to contrast.






16. 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?






17. 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?






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






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






20. 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?






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






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






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






24. What is high-pass filtering also called?






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






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






28. 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?






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






30. What is high-pass filtering also called?






31. 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.






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






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






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






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






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






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






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






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






40. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






41. Resolution is controlled by what?






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






43. What can memory be transferred as?






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






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






46. What is an individual matrix box or picture element?






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






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






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






50. Computer programs are called what?