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






2. What modalities are array processors useful for?






3. What is the name for a binary digit?






4. Computerized digital images are described in terms of what






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






6. Increased noise = _____ image contrast.






7. 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?






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






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






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






11. What changes the pixel value by addition or subtraction and controls image density?






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






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






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






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






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






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






18. 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.






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






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






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






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






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






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






25. 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.






26. What was the earliest computer device called?






27. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






29. 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?






30. What are the two most common output devices?






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






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






33. 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?






34. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






36. Noise is measured as what?






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






38. Window width and contrast have an ____ relationship.






39. What are devices that process information?






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






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






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






43. What are the two ways detectors acquire information?






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






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






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






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






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






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






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