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 devices that process information?






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






3. What are the two most common output devices?






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






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






6. What can memory be transferred as?






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






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






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






10. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






11. 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.






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






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






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






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






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






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






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






19. What modalities are array processors useful for?






20. What is high-pass filtering also called?






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






22. When was ENIAC invented?






23. Computers operate from ____ ____ language.






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






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






26. What does DICOM stand for?






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






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






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






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






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






32. Computerized digital images are described in terms of what






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






34. 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.






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






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






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






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






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






40. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






41. 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?






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






43. What is the mathematical algorithm used to create all medical images?






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






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






46. 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?






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






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






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






50. What are the two most common output devices?