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. What type of memory storage devices are required for large amounts of data?






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






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






5. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






7. What does DICOM stand for?






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






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






10. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






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






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






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






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






16. When was ENIAC invented?






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 does a 0 in binary code stand for?






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






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






21. What is the name for a binary digit?






22. What is required for collection of input information?






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






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






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






26. Who or What is responsible for density changes on a digital image? On a manual image






27. Noise is measured as what?






28. 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.






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






30. Noise is measured as what?






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






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






33. 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?






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






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






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






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






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






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






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






42. What are the two most common output devices?






43. Computers operate from ____ ____ language.






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






45. Increased noise = _____ image contrast.






46. Resolution is controlled by what?






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






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






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






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