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






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






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






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






5. Computerized digital images are described in terms of what






6. There is a ___ relationship between subject contrast and acquired data contrast.






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






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






9. A low contrast image has a ___ frequency.






10. 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?






11. What does a 0 in binary code stand for?






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






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






14. What is required for collection of input information?






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






16. Window width and contrast have an ____ relationship.






17. What does DICOM stand for?






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






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






20. What input device do radiographers use on a normal basis?






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






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






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






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






25. What is the name for a binary digit?






26. What is high-pass filtering also called?






27. A high contrast image has a ___ frequency.






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






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






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






31. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






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






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






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






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






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






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






39. Computers operate from ____ ____ language.






40. A larger matrix provides ____ pixels.






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






42. A larger matrix provides ____ pixels.






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






44. Noise is ____ related to contrast.






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






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






47. 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?






48. 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.






49. What are the 3 classifications of digitized image filters?






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