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 are the two types of information computers use?






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






3. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






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






5. Computers operate from ____ ____ language.






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






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






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






9. What modalities are array processors useful for?






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






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






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






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






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






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






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






17. Computer programs are called what?






18. A larger matrix provides ____ pixels.






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






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






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






22. When detectors acquire their information through ____ they are receiving all the info at once.






23. Window width and contrast have an ____ relationship.






24. Fluoroscopic noise mostly comes from what?






25. 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?






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






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






28. 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?






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






30. Computers operate from ____ ____ language.






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






32. Computer equipment is called what?






33. Which type of information consists of operating instructions?






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






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






36. What is required for collection of input information?






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






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






39. Window width and contrast have an ____ relationship.






40. What determines resolution?






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






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






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






44. A larger matrix provides ____ pixels.






45. A low contrast image has a ___ frequency.






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






47. Noise is ____ related to contrast.






48. What are devices that process information?






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






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