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






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






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






4. 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?






5. Computer memory is often rated in terms of total ____ memory.






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






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






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






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






10. Around what time did digital computerization come out for CT and US?






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






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






13. Computers operate from ____ ____ language.






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






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






16. Fluoroscopic noise mostly comes from what?






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






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






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






20. What was the earliest computer device called?






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






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






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






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






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






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






27. What does DICOM stand for?






28. 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?






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






30. 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.






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






32. Increased noise = _____ image contrast.






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






34. Computer programs are called what?






35. A low contrast image has a ___ frequency.






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






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






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






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






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






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






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






43. What directs information to and from various parts of the computer?






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






45. Which type of information consists of operating instructions?






46. Computer programs are called what?






47. What is required for collection of input information?






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






49. 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.






50. Computers operate from ____ ____ language.