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 background information that does not contribute to the image quality?






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






3. What is the primary limitation with the resolution on digital images?






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






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






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






7. What does a 0 in binary code stand for?






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






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






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






11. What provides specific instructions for calculations and sequential steps to be followed?






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






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






14. When was ENIAC invented?






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






16. In what time period did mathematical theory and solid-state electronics come out?






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






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






19. Computer programs are called what?






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






21. A larger matrix provides ____ pixels.






22. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






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






24. What provides specific instructions for calculations and sequential steps to be followed?






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






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






27. When was ENIAC invented?






28. What is the name for a binary digit?






29. Which type of information consists of collected facts?






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






31. What is the name for a binary digit?






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






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






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






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






36. 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?






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






38. What can memory be transferred as?






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






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






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






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






43. Computerized digital images are described in terms of what






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






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






46. A high contrast image has a ___ frequency.






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






48. Which type of information consists of collected facts?






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






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