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






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






3. A high contrast image has a ___ frequency.






4. 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?






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






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






7. In what time period did microchip technology come out?






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






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






10. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






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






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






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






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






15. Computers operate from ____ ____ language.






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






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






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






19. Resolution is controlled by what?






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






21. What is the random background information that does not contribute to the image quality?






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






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






24. 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?






25. What are the two most common output devices?






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






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






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






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






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






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






32. Computer programs are called what?






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






34. Window width and contrast have an ____ relationship.






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






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






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






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






39. Fluoroscopic noise mostly comes from what?






40. 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?






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






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






43. What is high-pass filtering also called?






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






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. Each pixel is capable of representing a wide range of what?






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






48. What is the random background information that does not contribute to the image quality?






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






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