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. 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.






2. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






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






5. 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?






6. What does a 1 in binary code stand for?






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






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






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






10. 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?






11. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






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






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






14. Noise is ____ related to contrast.






15. What modalities are array processors useful for?






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






17. Resolution is controlled by what?






18. What is required for collection of input information?






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






20. Which memory replaces new information with the old; can change?






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






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






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






24. What was the earliest computer device called?






25. Which type of information consists of collected facts?






26. What are devices that process information?






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






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






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






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






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






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






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






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






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






36. What changes the pixel value by addition or subtraction and controls image density?






37. What is the name of the 'modern electronic computer'?






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






39. When was ENIAC invented?






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






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






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






43. What changes the pixel value by addition or subtraction and controls image density?






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






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






46. Noise is measured as what?






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






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






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






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