Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 frequency response of the incoming signal called?






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






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






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






5. What is an individual matrix box or picture element?






6. Computer programs are called what?






7. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






8. Computer equipment is called what?






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






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






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






12. What determines resolution?






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






14. A larger matrix provides ____ pixels.






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






16. Modalities differ in bit depth that is available depending on the capabilities of what?






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






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






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






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






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






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






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






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






25. Computerized digital images are described in terms of what






26. Window width and contrast have an ____ relationship.






27. What is the name for a binary digit?






28. Fluoroscopic noise mostly comes from what?






29. 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.






30. Resolution is controlled by what?






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






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






33. What is the name for a binary digit?






34. Computer equipment is called what?






35. What is required for collection of input information?






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






37. 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?






38. What was the earliest computer device called?






39. When was ENIAC invented?






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






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






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






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






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






45. What determines resolution?






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






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






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






49. 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?






50. A high contrast image has a ___ frequency.







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