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






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






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






4. 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?






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






6. What was the earliest computer device called?






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






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






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






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






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






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






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






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






15. 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.






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






17. Which type of information consists of collected facts?






18. The computer either ____ or ____ selected frequencies during the filtering process.






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






20. When was ENIAC invented?






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






22. What are the two most common output devices?






23. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






25. 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?






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






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






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






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






30. 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?






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






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






33. What determines resolution?






34. Computer equipment is called what?






35. What does DICOM stand for?






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






37. What determines resolution?






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






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






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






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






42. What is the measure of the differences between the data values referred to as?






43. What are the 3 classifications of digitized image filters?






44. 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?






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






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






47. What are devices that process information?






48. What is the name for a binary digit?






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






50. Fluoroscopic noise mostly comes from what?