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






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






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






4. 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.






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






6. What are the two ways detectors acquire information?






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






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






9. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






10. Window width and contrast have an ____ relationship.






11. Computer equipment is called what?






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






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






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






15. 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.






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






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






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






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






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






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






22. 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?






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






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






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






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






27. What does DICOM stand for?






28. Window width and contrast have an ____ relationship.






29. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






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






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






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






33. When was ENIAC invented?






34. Computerized digital images are described in terms of what






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






36. What are devices that process information?






37. What are the two most common output devices?






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






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






40. What is the primary limitation with the resolution on digital images?






41. What is the primary limitation with the resolution on digital images?






42. What can memory be transferred as?






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






44. What can memory be transferred as?






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






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






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






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






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






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