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






2. Fluoroscopic noise mostly comes from what?






3. 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?






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






5. Which type of information consists of collected facts?






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






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






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






9. Computers operate from ____ ____ language.






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






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






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






13. Which type of information consists of collected facts?






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






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






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






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






18. 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?






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






20. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






21. 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?






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






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






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






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






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






27. When was ENIAC invented?






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






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






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






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






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






33. 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?






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






35. When detectors acquire their information through ____ they are receiving all the info at once.






36. Computer equipment is called what?






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






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






39. What determines resolution?






40. All medical imaging is achieved with which type of computers?






41. A low contrast image has a ___ frequency.






42. Computerized digital images are described in terms of what






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






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






45. A low contrast image has a ___ frequency.






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






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






48. What are the two most common output devices?






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






50. A high contrast image has a ___ frequency.