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






2. What does DICOM stand for?






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






4. A low contrast image has a ___ frequency.






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






6. What is the random background information that does not contribute to the image quality?






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






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






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






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






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






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






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






14. Computer equipment is called what?






15. Computers operate from ____ ____ language.






16. 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.






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






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






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






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






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






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






23. Fluoroscopic noise mostly comes from what?






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






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






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






27. 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?






28. What modalities are array processors useful for?






29. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






31. What does a 1 in binary code stand for?






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






33. A larger matrix provides ____ pixels.






34. What can memory be transferred as?






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






36. What is an individual matrix box or picture element?






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






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






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






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






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






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






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






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






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






46. What determines resolution?






47. All medical imaging is achieved with which type of computers?






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






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






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







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