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. When was ENIAC invented?






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






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






4. 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?






5. Resolution is controlled by what?






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






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






8. Who or What is responsible for density changes on a digital image? On a manual image






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






10. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.






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






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






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






14. Computer equipment is called what?






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






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






17. Window width and contrast have an ____ relationship.






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






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






20. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






21. 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?






22. Which type of information consists of collected facts?






23. A high contrast image has a ___ frequency.






24. A low contrast image has a ___ frequency.






25. Increased noise = _____ image contrast.






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






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






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






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






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






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






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






33. A larger matrix provides ____ pixels.






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






35. Computerized digital images are described in terms of what






36. Which type of information consists of operating instructions?






37. 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.






38. Computers operate from ____ ____ language.






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






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






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






42. What provides specific instructions for calculations and sequential steps to be followed?






43. What are the two types of information computers use?






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






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






46. Increased noise = _____ image contrast.






47. 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?






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






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






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