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. Resolution is controlled by what?






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






3. 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.






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






5. Which computers handle data composed of definite quantities of current?






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






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






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






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






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 is the primary limitation with the resolution on digital images?






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






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






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






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






16. What is high-pass filtering also called?






17. What are devices that process information?






18. Noise is ____ related to contrast.






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






20. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






21. What was the earliest computer device called?






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






23. 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.






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






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






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






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






28. Computer programs are called what?






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






30. Which type of information consists of collected facts?






31. 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?






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






33. What is the name for a binary digit?






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






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






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






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






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






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






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






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






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






43. What does DICOM stand for?






44. When was ENIAC invented?






45. Window width and contrast have an ____ relationship.






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






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






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






49. Noise is ____ related to contrast.






50. What provides specific instructions for calculations and sequential steps to be followed?