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






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






3. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






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






5. What modalities are array processors useful for?






6. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






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






8. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






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






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






11. Binary systems operate with a ___-symbol language.






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






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






14. What can memory be transferred as?






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






16. 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?






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






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






19. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






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






21. What is the equation for determining gray scale bit depth?






22. What are the two most common output devices?






23. Computer programs are called what?






24. 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.






25. The _____ the matrix size - the better the resolution.






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






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






28. If window width increases - image contrast will ____.






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






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






31. 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?






32. Around what time did digital computerization come out for CT and US?






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






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






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






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






37. What is the mathematical algorithm used to create all medical images?






38. What are the two most common output devices?






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






40. A low contrast image has a ___ frequency.






41. 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?






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






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






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






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






46. What is an image that has been converted into numerical values for transmission or processing?






47. 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?






48. 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?






49. A high contrast image has a ___ frequency.






50. What is the mathematical algorithm used to create all medical images?







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