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 directs information to and from various parts of the computer?






2. A high contrast image has a ___ frequency.






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






4. 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?






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






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






7. What is required for collection of input information?






8. What is the 'noisiest' component of a digital system?






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






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






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






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






13. What was the earliest computer device called?






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






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






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






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






18. Computer equipment is called what?






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






20. What are the two ways detectors acquire information?






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






22. The computer either ____ or ____ selected frequencies during the filtering process.






23. Which type of information consists of operating instructions?






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






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






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






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






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






29. Window width and contrast have an ____ relationship.






30. Computers operate from ____ ____ language.






31. 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?






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






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






34. When was ENIAC invented?






35. A larger matrix provides ____ pixels.






36. What is high-pass filtering also called?






37. What changes the pixel value by addition or subtraction and controls image density?






38. When subject contrast is high - the acquired data contrast will be ____.






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






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






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






42. 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?






43. Computerized digital images are described in terms of what






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






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






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






47. What determines resolution?






48. What modalities are array processors useful for?






49. What type of scanning increases resolution but can't be used in real-time dynamic studies?






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