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






2. Noise is measured as what?






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






4. What are devices that process information?






5. What provides specific instructions for calculations and sequential steps to be followed?






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






7. A larger matrix provides ____ pixels.






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






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






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






11. 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?






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






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






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






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






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






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






18. Which type of information consists of collected facts?






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






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 the mathematical algorithm used to create all medical images?






22. What is the name for a binary digit?






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






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






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






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






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






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






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






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






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






32. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






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






34. 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.






35. 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?






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






37. What is the 'heart' of every computer?






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






39. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






40. 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?






41. What does a 1 in binary code stand for?






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






43. A high contrast image has a ___ frequency.






44. What provides specific instructions for calculations and sequential steps to be followed?






45. When was ENIAC invented?






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






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






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






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






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