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






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






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






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






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






6. What are the two most common output devices?






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






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






9. 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?






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






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






12. What determines resolution?






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






14. Computer programs are called what?






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






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






17. A high S/N indicates ___ noise in the image.






18. Increased noise = _____ image contrast.






19. Computers operate from ____ ____ language.






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






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






22. What are the two ways detectors acquire information?






23. Fluoroscopic noise mostly comes from what?






24. 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?






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






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






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






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






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






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






31. What is the name for a binary digit?






32. 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.






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






34. 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.






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






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






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






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






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






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






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






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






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






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






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






47. 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?






48. What can memory be transferred as?






49. Computer programs are called what?






50. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






Can you answer 50 questions in 15 minutes?



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