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






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






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






4. When was ENIAC invented?






5. Fluoroscopic noise mostly comes from what?






6. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






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






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






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






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






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






12. Which type of information consists of collected facts?






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






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






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






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






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






18. 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?






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






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






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






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






23. What is high-pass filtering also called?






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






25. A larger matrix provides ____ pixels.






26. What is the name for a binary digit?






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






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






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






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






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






32. 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?






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






34. A low contrast image has a ___ frequency.






35. 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.






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






37. What is the name for a binary digit?






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






39. 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.






40. 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?






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






42. Computer equipment is called what?






43. What can memory be transferred as?






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






45. 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?






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






47. What was the earliest computer device called?






48. What can memory be transferred as?






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






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