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. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






4. Increased noise = _____ image contrast.






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






6. A larger matrix provides ____ pixels.






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






8. What does DICOM stand for?






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






10. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






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






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






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






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






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






17. What is required for collection of input information?






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






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






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






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






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






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






24. What modalities are array processors useful for?






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






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






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






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






29. What are devices that process information?






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






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






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






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






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






35. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






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






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






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






40. When detectors acquire their information by ____ they are receiving info from a specific area.






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






42. 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?






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






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






45. Window width and contrast have an ____ relationship.






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






47. What can memory be transferred as?






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






49. Window width and contrast have an ____ relationship.






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