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






2. Noise is measured as what?






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






4. Computerized digital images are described in terms of what






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






6. What does DICOM stand for?






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






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






9. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






10. What are devices that process information?






11. When was ENIAC invented?






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






13. 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?






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






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






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






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






18. Medical imaging is often achieved from information that has been processed by what?






19. 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?






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






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






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






23. What determines resolution?






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






25. 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?






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






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






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






29. 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?






30. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






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






32. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






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






34. Noise is ____ related to contrast.






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






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






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






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






39. What is high-pass filtering also called?






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






41. When was ENIAC invented?






42. What are the two ways detectors acquire information?






43. A low contrast image has a ___ frequency.






44. What determines resolution?






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






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






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






48. What is required for collection of input information?






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






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