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






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






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






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






5. 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?






6. Noise is measured as what?






7. Noise is ____ related to contrast.






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






9. What determines resolution?






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






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






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






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






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






15. Window width and contrast have an ____ relationship.






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






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






18. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






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






20. Which type of information consists of operating instructions?






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






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






23. A low contrast image has a ___ frequency.






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






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






26. A larger matrix provides ____ pixels.






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






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






29. Window width and contrast have an ____ relationship.






30. 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?






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






32. What does DICOM stand for?






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






34. 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?






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






36. What are devices that process information?






37. What are the two ways detectors acquire information?






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






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






40. 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?






41. Computer equipment is called what?






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






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






44. What is high-pass filtering also called?






45. What type of memory storage devices are required for large amounts of data?






46. Computer programs are called what?






47. Computers operate from ____ ____ language.






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






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






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