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 type of information consists of collected facts?






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






3. What is the name for a binary digit?






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






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






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






7. What input device do radiographers use on a normal basis?






8. What determines resolution?






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






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






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






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






13. What are the two most common output devices?






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






15. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






16. Which memory can only be extracted without alteration; cannot change?






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






18. What determines resolution?






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






20. What does DICOM stand for?






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






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






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






24. What is required for collection of input information?






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






26. What does DICOM stand for?






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






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






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






30. 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?






31. In what time period did mathematical theory and solid-state electronics come out?






32. 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?






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






34. Computer programs are called what?






35. What modalities are array processors useful for?






36. What are devices that process information?






37. What input device do radiographers use on a normal basis?






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






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






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






41. Increased noise = _____ image contrast.






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






43. A high contrast image has a ___ frequency.






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






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






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






47. When was ENIAC invented?






48. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






50. In what time period did mathematical theory and solid-state electronics come out?