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






2. Who or What is responsible for density changes on a digital image? On a manual image






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






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






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






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






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






8. What type of scanning increases resolution but can't be used in real-time dynamic studies?






9. What is the name for a binary digit?






10. Fluoroscopic noise mostly comes from what?






11. Noise is ____ related to contrast.






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






13. 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?






14. What changes the pixel value by multiplication or division and controls image contrast?






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






16. What are the two most common output devices?






17. Noise is measured as what?






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






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






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






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






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






23. Each pixel is capable of representing a wide range of what?






24. 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.






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






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. What is an individual matrix box or picture element?






28. Which type of information consists of operating instructions?






29. What changes the pixel value by multiplication or division and controls image contrast?






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






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






32. 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?






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






34. A high contrast image has a ___ frequency.






35. Fluoroscopic noise mostly comes from what?






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






37. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






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






40. What are the two ways detectors acquire information?






41. What is high-pass filtering also called?






42. What is required for collection of input information?






43. When subject contrast is high - the acquired data contrast will be ____.






44. A high contrast image has a ___ frequency.






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






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






47. Modalities differ in bit depth that is available depending on the capabilities of what?






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






49. Noise is measured as what?






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