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






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






3. What does DICOM stand for?






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






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






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






7. Noise is ____ related to contrast.






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






9. In what time period did mathematical theory and solid-state electronics come out?






10. 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.






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






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






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






14. The _____ the matrix size - the better the resolution.






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






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






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






18. Computerized digital images are described in terms of what






19. Increased noise = _____ image contrast.






20. Noise is measured as what?






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






22. Modalities differ in bit depth that is available depending on the capabilities of what?






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






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






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






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






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






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






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






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






31. Which type of information consists of collected facts?






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






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






34. What are the two ways detectors acquire information?






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






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






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






38. A low contrast image has a ___ frequency.






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






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






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






42. What is required for collection of input information?






43. What is the name for a binary digit?






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






45. What was the earliest computer device called?






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






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






48. Computer equipment is called what?






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






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