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






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






3. What does DICOM stand for?






4. What is a square series of boxes that gives form to the image?






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






6. What was the earliest computer device called?






7. Window width and contrast have an ____ relationship.






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






9. What are the two most common output devices?






10. What is required for collection of input information?






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






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






13. 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?






14. What are the two most common output devices?






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






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






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






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






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






20. What is high-pass filtering also called?






21. What is the raw data to which a Fourier Transformation is applied to create the digital image?






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






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






24. What does a 1 in binary code stand for?






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






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






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






28. What is the frequency response of the incoming signal called?






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






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






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






32. What are devices that process information?






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






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






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






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






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






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






39. 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.






40. What is the name for a binary digit?






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






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






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






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






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






46. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






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






48. What are devices that process information?






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






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