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






2. Noise is measured as what?






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






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






5. Computers operate from ____ ____ language.






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






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






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






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






10. What are the two most common output devices?






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






12. The ____ is the heart of the computer while the ___ is the vessels.






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






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






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






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






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






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






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






20. Which type of information consists of operating instructions?






21. Noise is ____ related to contrast.






22. What are the 3 classifications of digitized image filters?






23. A high contrast image has a ___ frequency.






24. 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?






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






26. What was the earliest computer device called?






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






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






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






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






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






32. Which computers handle data composed of definite quantities of current?






33. What is an image that has been converted into numerical values for transmission or processing?






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






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






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






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






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






39. Computer equipment is called what?






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






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






42. Resolution is controlled by what?






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






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






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






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






47. What is high-pass filtering also called?






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






49. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






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