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. What is the 'heart' of every computer?






2. Window width and contrast have an ____ relationship.






3. What are devices that process information?






4. 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?






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






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






7. What does DICOM stand for?






8. A larger matrix provides ____ pixels.






9. 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.






10. Which type of information consists of operating instructions?






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






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






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






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






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






16. 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.






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






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






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






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






21. A larger matrix provides ____ pixels.






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






23. Resolution is controlled by what?






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






25. Computers operate from ____ ____ language.






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






27. Noise is ____ related to contrast.






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






29. The quality of the data acquired from the IR is measured by what three data characteristics?






30. A high contrast image has a ___ frequency.






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






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






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






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






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






36. 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.






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






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






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






40. Which type of information consists of collected facts?






41. What type of memory storage devices are required for large amounts of data?






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






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






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






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






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






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






48. 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.






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






50. Noise is ____ related to contrast.