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. Computer equipment is called what?






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






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






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






5. What are devices that process information?






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






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






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






9. 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.






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






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






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






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






14. 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.






15. Which type of information consists of operating instructions?






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






17. What are devices that process information?






18. Noise is ____ related to contrast.






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






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






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






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






23. Computers operate from ____ ____ language.






24. Which type of information consists of operating instructions?






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






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






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






28. A low contrast image has a ___ frequency.






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






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






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






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






33. 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?






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






35. What does DICOM stand for?






36. 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?






37. What input device do radiographers use on a normal basis?






38. 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?






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






40. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






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






42. 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.






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






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






45. Computer programs are called what?






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






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






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






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






50. Which type of information consists of collected facts?