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. Medical imaging is often achieved from information that has been processed by what?






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






3. Fluoroscopic noise mostly comes from what?






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






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






6. Computers operate from ____ ____ language.






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






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






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






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






11. Which type of information consists of collected facts?






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






13. What are devices that process information?






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






15. A high contrast image has a ___ frequency.






16. Fluoroscopic noise mostly comes from what?






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






18. What does DICOM stand for?






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






20. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






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






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






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






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






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






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






27. 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.






28. In what time period did microchip technology come out?






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






30. Which type of information consists of operating instructions?






31. What is high-pass filtering also called?






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






33. What was the earliest computer device called?






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






35. 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?






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






37. A low contrast image has a ___ frequency.






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






39. Computerized digital images are described in terms of what






40. What are the two ways detectors acquire information?






41. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






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






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






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






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






46. A low contrast image has a ___ frequency.






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






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






49. What modalities are array processors useful for?






50. 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?