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






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






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






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






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






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






7. What can memory be transferred as?






8. 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?






9. When was ENIAC invented?






10. A __ _____ disk will store over 10000000 bytes of information.






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






12. A __ _____ disk will store over 10000000 bytes of information.






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






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






15. Noise is ____ related to contrast.






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






17. A low contrast image has a ___ frequency.






18. What does DICOM stand for?






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






20. What are the two ways detectors acquire information?






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






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






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






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






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






26. A larger matrix provides ____ pixels.






27. What determines resolution?






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






29. The ____ is the heart of the computer while the ___ is the vessels.






30. Noise is measured as what?






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






32. Resolution is controlled by what?






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






34. What are the two ways detectors acquire information?






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






36. The ____ is the heart of the computer while the ___ is the vessels.






37. A high contrast image has a ___ frequency.






38. Computerized digital images are described in terms of what






39. 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?






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






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






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






43. Fluoroscopic noise mostly comes from what?






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






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






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






47. Computerized digital images are described in terms of what






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






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






50. 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.