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






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






3. What does DICOM stand for?






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






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






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






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






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






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






10. Computer programs are called what?






11. A larger matrix provides ____ pixels.






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






13. Computerized digital images are described in terms of what






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






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






16. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






17. 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?






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






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






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






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






23. Noise is measured as what?






24. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






25. Computers operate from ____ ____ language.






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






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






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






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






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






31. Fluoroscopic noise mostly comes from what?






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






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






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






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






36. There is a ___ relationship between subject contrast and acquired data contrast.






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






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






39. What is the 'noisiest' component of a digital system?






40. A high contrast image has a ___ frequency.






41. When was ENIAC invented?






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






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






44. What does DICOM stand for?






45. 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?






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






47. A high contrast image has a ___ frequency.






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






49. Computerized digital images are described in terms of what






50. What are the two ways detectors acquire information?