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






2. Which computers handle data composed of definite quantities of current?






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






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






5. Computers operate from ____ ____ language.






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






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






8. What is the 'noisiest' component of a digital system?






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






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






11. Medical imaging is often achieved from information that has been processed by what?






12. A low contrast image has a ___ frequency.






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






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






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






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






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






18. 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?






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






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






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






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






23. 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?






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






25. 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?






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






27. Computer memory is often rated in terms of total ____ memory.






28. In what time period did microchip technology come out?






29. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






30. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






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






32. Medical imaging is often achieved from information that has been processed by what?






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






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






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






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






37. What was the earliest computer device called?






38. What are the two ways detectors acquire information?






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






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






41. Which type of information consists of collected facts?






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






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






44. Computer programs are called what?






45. What determines resolution?






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






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






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






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






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