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






2. Computerized digital images are described in terms of what






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






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






5. Noise is measured as what?






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






7. Noise is ____ related to contrast.






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






9. 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?






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






11. What can memory be transferred as?






12. A high contrast image has a ___ frequency.






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






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






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






16. Fluoroscopic noise mostly comes from what?






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






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






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






20. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






22. Computers operate from ____ ____ language.






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






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






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






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






27. What is the name for an 8-bit word?






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






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






30. What is the name for an 8-bit word?






31. What is the 'heart' of every computer?






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






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






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






35. What does DICOM stand for?






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






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






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






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






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






41. What determines resolution?






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






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






44. Noise is measured as what?






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






46. Window width and contrast have an ____ relationship.






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






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






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






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