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






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






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






4. If the window level increases - density will _____.






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






6. A low contrast image has a ___ frequency.






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






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






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






10. Computers operate from ____ ____ language.






11. Computer programs are called what?






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






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






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






15. 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?






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






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






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






19. 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?






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






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






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






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






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






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






26. 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.






27. 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.






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






29. Increased noise = _____ image contrast.






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






31. 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?






32. What is the name for a binary digit?






33. Computer equipment is called what?






34. What is required for collection of input information?






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






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






37. Which type of information consists of operating instructions?






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






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






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






41. Computers operate from ____ ____ language.






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






43. Resolution is controlled by what?






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






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






46. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






48. A larger matrix provides ____ pixels.






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






50. 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.