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 is required for collection of input information?






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






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






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






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






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






7. Which type of information consists of collected facts?






8. What is the name for a binary digit?






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






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






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






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






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






14. Fluoroscopic noise mostly comes from what?






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






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






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






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






19. Which type of information consists of collected facts?






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






21. 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.






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






23. What are devices that process information?






24. Noise is ____ related to contrast.






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






26. 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.






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






28. 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?






29. What are devices that process information?






30. Resolution is controlled by what?






31. Computer equipment is called what?






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






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






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






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






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






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






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






39. What is high-pass filtering also called?






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






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






42. 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.






43. When detectors acquire their information by ____ they are receiving info from a specific area.






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






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






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






47. Window width and contrast have an ____ relationship.






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






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






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