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. Window width and contrast have an ____ relationship.






2. A high contrast image has a ___ frequency.






3. A low contrast image has a ___ frequency.






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






5. 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?






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






7. Computers operate from ____ ____ language.






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






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






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






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






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






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






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






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






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






17. A larger matrix provides ____ pixels.






18. Computer programs are called what?






19. 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?






20. Noise is ____ related to contrast.






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






22. Which type of information consists of operating instructions?






23. Which type of information consists of collected facts?






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






25. 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.






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






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






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






29. What is high-pass filtering also called?






30. What is the random background information that does not contribute to the image quality?






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






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






33. What can memory be transferred as?






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






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






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






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






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






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






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






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






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






43. What is required for collection of input information?






44. 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.






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






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






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






48. 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?






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






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