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 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






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






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






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






6. Which type of information consists of operating instructions?






7. What are the two most common output devices?






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






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






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






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






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






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






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






15. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






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






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






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






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






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






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






22. Which type of information consists of collected facts?






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






24. What was the earliest computer device called?






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






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






27. Digital detectors are capable of producing ______ shades of gray.






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






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






30. What are the two most common output devices?






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






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






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






34. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






35. What are the two ways detectors acquire information?






36. The human visual range is ___ or fewer shades of gray.






37. 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?






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






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






40. What modalities are array processors useful for?






41. What determines resolution?






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






43. Increased noise = _____ image contrast.






44. What are the two ways detectors acquire information?






45. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






47. Computers operate from ____ ____ language.






48. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






49. Computer equipment is called what?






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