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 memory replaces new information with the old; can change?






2. Increased noise = _____ image contrast.






3. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






4. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






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






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






8. Increased noise = _____ image contrast.






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






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






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






12. Computerized digital images are described in terms of what






13. 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?






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






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






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






17. What is high-pass filtering also called?






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






19. What is required for collection of input information?






20. What is required for collection of input information?






21. What modalities are array processors useful for?






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






23. When was ENIAC invented?






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






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






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






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






28. 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?






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






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






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






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






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






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






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






36. Fluoroscopic noise mostly comes from what?






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






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






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






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






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






42. Window width and contrast have an ____ relationship.






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






44. Noise is measured as what?






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






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






47. A larger matrix provides ____ pixels.






48. 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.






49. In what time period did microchip technology come out?






50. What are the two most common output devices?