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. A high contrast image has a ___ frequency.






2. Noise is measured as what?






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






4. Resolution is controlled by what?






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






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






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






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






9. A low contrast image has a ___ frequency.






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






11. Fluoroscopic noise mostly comes from what?






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






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






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






15. When was ENIAC invented?






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






17. 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?






18. Noise is ____ related to contrast.






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






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






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






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






23. What can memory be transferred as?






24. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






25. What is critical to how fast the computer system can function?






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






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






28. What is the name for a binary digit?






29. Window width and contrast have an ____ relationship.






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






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






32. Which type of information consists of collected facts?






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






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






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






36. 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.






37. What is required for collection of input information?






38. 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.






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






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






41. What are the two ways detectors acquire information?






42. What determines resolution?






43. What are the two most common output devices?






44. Which memory can only be extracted without alteration; cannot change?






45. Computer equipment is called what?






46. The computer either ____ or ____ selected frequencies during the filtering process.






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






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






49. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






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