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. Computers operate from ____ ____ language.






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






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






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






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






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






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






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






9. Increased noise = _____ image contrast.






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






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






12. What are devices that process information?






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






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






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






16. Which type of information consists of collected facts?






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






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






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






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






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






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






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






24. What is the name for a binary digit?






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






26. What is critical to how fast the computer system can function?






27. What determines resolution?






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






29. A larger matrix provides ____ pixels.






30. What was the earliest computer device called?






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






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






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






34. 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?






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






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






37. Window width and contrast have an ____ relationship.






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






39. What are the two types of information computers use?






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






41. 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.






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






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






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






46. 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?






47. 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.






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






49. Computer equipment is called what?






50. Noise is ____ related to contrast.