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 input device do radiographers use on a normal basis?






2. A high S/N indicates ___ noise in the image.






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






4. 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?






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






6. Which type of information consists of operating instructions?






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






8. What are devices that process information?






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






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






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






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






13. 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?






14. What does a 0 in binary code stand for?






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






16. Increased noise = _____ image contrast.






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






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






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






20. 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.






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






22. Window width and contrast have an ____ relationship.






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






24. What determines resolution?






25. Which type of information consists of collected facts?






26. Computer programs are called what?






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






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






29. Computers operate from ____ ____ language.






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






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






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






33. Noise is measured as what?






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






35. What are the two most common output devices?






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






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






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






39. Noise is ____ related to contrast.






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






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






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






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






44. What does DICOM stand for?






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






46. When was ENIAC invented?






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






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






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






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