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






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






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






4. In what time period did microchip technology come out?






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






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






7. What permit input/output of information to or from the CPU?






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






9. Noise is measured as what?






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






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






12. 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?






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






14. Which type of information consists of operating instructions?






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






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






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






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






19. What is required for collection of input information?






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






21. 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?






22. A larger matrix provides ____ pixels.






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






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






25. When was ENIAC invented?






26. Each pixel is capable of representing a wide range of what?






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






28. Which type of information consists of operating instructions?






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






30. Fluoroscopic noise mostly comes from what?






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






32. What determines resolution?






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






34. What changes the pixel value by addition or subtraction and controls image density?






35. A low contrast image has a ___ frequency.






36. 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?






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






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






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






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






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






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






43. Noise is ____ related to contrast.






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






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






46. What are the two most common output devices?






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






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






49. What permit input/output of information to or from the CPU?






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