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 can memory be transferred as?






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






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






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






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






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






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






8. Increased noise = _____ image contrast.






9. The human visual range is ___ or fewer shades of gray.






10. What is the name of the 'modern electronic computer'?






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






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






13. What determines resolution?






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






15. Computers operate from ____ ____ language.






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






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






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






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






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






21. Fluoroscopic noise mostly comes from what?






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






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






24. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






27. Computer equipment is called what?






28. When was ENIAC invented?






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






30. 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.






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






32. Noise is measured as what?






33. 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?






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






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






36. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






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






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






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






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






41. Noise is measured as what?






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






43. What is the name of the 'modern electronic computer'?






44. Window width and contrast have an ____ relationship.






45. Which memory can only be extracted without alteration; cannot change?






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






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






48. What is the name for a binary digit?






49. What does DICOM stand for?






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