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. 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?






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






3. A larger matrix provides ____ pixels.






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






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






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






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






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






9. What modalities are array processors useful for?






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






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






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






13. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






14. Increased noise = _____ image contrast.






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






16. 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.






17. Resolution is controlled by what?






18. What does DICOM stand for?






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






20. What determines resolution?






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






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






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






24. What are the two ways detectors acquire information?






25. Noise is ____ related to contrast.






26. 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?






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






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






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






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






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






32. A larger matrix provides ____ pixels.






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






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






35. A high contrast image has a ___ frequency.






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






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






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






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






40. Fluoroscopic noise mostly comes from what?






41. What are devices that process information?






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






43. Digitalization of analog information (increases / reduces) the quality and quantity of information?






44. 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.






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






46. Window width and contrast have an ____ relationship.






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






48. What are the two most common output devices?






49. 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?






50. Computerized digital images are described in terms of what