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






2. What does DICOM stand for?






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






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






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






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






7. Fluoroscopic noise mostly comes from what?






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






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






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






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






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






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






14. What is the primary limitation with the resolution on digital images?






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






16. Noise is ____ related to contrast.






17. 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.






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






19. Increased noise = _____ image contrast.






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






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






22. What is the primary limitation with the resolution on digital images?






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






24. Computerized digital images are described in terms of what






25. 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?






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






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






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






29. What is the information stored as magnetic variations referred to as?






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






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






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






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






34. Computerized digital images are described in terms of what






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






36. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






38. What was the earliest computer device called?






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






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






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






42. When subject contrast is high - the acquired data contrast will be ____.






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






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






45. Which type of information consists of collected facts?






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






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






48. 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?






49. A low contrast image has a ___ frequency.






50. What is high-pass filtering also called?