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 'read-only' memory that contains basic operating instructions that are almost never changing?






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






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






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






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






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






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






8. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






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






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






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






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






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






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






16. A low contrast image has a ___ frequency.






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






18. Fluoroscopic noise mostly comes from what?






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






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






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






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






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






24. 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?






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






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






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






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






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






30. A larger matrix provides ____ pixels.






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






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






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






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






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






36. Computerized digital images are described in terms of what






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






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






39. Noise is measured as what?






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






41. Computer equipment is called what?






42. What is the equation for determining gray scale bit depth?






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






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






45. Resolution is controlled by what?






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






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






48. A high contrast image has a ___ frequency.






49. What is the equation for determining gray scale bit depth?






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