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. In what time period did microchip technology come out?






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






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






4. What is the measure of the differences between the data values referred to as?






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






6. What modalities are array processors useful for?






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






8. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






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






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






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






13. What is the name for a binary digit?






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






36. 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?






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






38. What are the two ways detectors acquire information?






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






40. Digitalization of analog information (increases / reduces) the quality and quantity of information?






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






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. Computer programs are called what?






44. What are the two ways detectors acquire information?






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






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






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






48. What are devices that process information?






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






50. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained