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






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






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






4. What are the two most common output devices?






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






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






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






8. Computers operate from ____ ____ language.






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






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






11. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






12. What does DICOM stand for?






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






14. Computers operate from ____ ____ language.






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






16. What is required for collection of input information?






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






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






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






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






22. What is required for collection of input information?






23. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






24. 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?






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






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






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






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






29. Window width and contrast have an ____ relationship.






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






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






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






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






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






35. When detectors acquire their information through ____ they are receiving all the info at once.






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






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






38. A larger matrix provides ____ pixels.






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






40. What determines resolution?






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






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






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






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






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






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






47. When was ENIAC invented?






48. What is the name for a binary digit?






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






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