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. Which type of information consists of collected facts?






2. When was ENIAC invented?






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






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






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






6. A low contrast image has a ___ frequency.






7. Window width and contrast have an ____ relationship.






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






9. Digital detectors are capable of producing ______ shades of gray.






10. What is the measure of the differences between the data values referred to as?






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






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






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






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






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






16. Which type of information consists of collected facts?






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






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






19. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






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






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






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






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






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






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






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






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






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






29. 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?






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






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






32. Fluoroscopic noise mostly comes from what?






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






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






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






36. Fluoroscopic noise mostly comes from what?






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






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






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






40. 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?






41. What was the earliest computer device called?






42. Digital detectors are capable of producing ______ shades of gray.






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






44. 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?






45. Which type of information consists of operating instructions?






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






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






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






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






50. What are the two most common output devices?