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






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






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






4. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






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






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






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






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






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






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






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






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






13. What changes the pixel value by multiplication or division and controls image contrast?






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






15. The computer either ____ or ____ selected frequencies during the filtering process.






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






17. 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?






18. Binary systems operate with a ___-symbol language.






19. 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?






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






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






22. Computer programs are called what?






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






24. Noise is ____ related to contrast.






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






26. A high contrast image has a ___ frequency.






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






28. Binary systems operate with a ___-symbol language.






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






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






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






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






33. Around what time did digital computerization come out for CT and US?






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






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






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






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






38. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






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






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






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






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






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






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






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






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






47. Computer equipment is called what?






48. What was the earliest computer device called?






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






50. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?