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 does a 1 in binary code stand for?






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






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






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 is high-pass filtering also called?






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






7. Computer equipment is called what?






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






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






10. What was the earliest computer device called?






11. What is the information stored as magnetic variations referred to as?






12. The quality of the data acquired from the IR is measured by what three data characteristics?






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






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






15. A high contrast image has a ___ frequency.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






30. 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.






31. Computer equipment is called what?






32. What modalities are array processors useful for?






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






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






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






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






37. What is required for collection of input information?






38. What provides specific instructions for calculations and sequential steps to be followed?






39. What is the information stored as magnetic variations referred to as?






40. What is required for collection of input information?






41. What are the two most common output devices?






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






43. A larger matrix provides ____ pixels.






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






45. Computers operate from ____ ____ language.






46. What are devices that process information?






47. 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?






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






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






50. Resolution is controlled by what?