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 can memory be transferred as?






2. A low contrast image has a ___ frequency.






3. Resolution is controlled by what?






4. Resolution is controlled by what?






5. What modalities are array processors useful for?






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






7. Computer equipment is called what?






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






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






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






11. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






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






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






15. Computer programs are called what?






16. 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?






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






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






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






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






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






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






23. When was ENIAC invented?






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






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






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






27. Which type of information consists of operating instructions?






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






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






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






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






32. Noise is ____ related to contrast.






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






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






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






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






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






38. What is required for collection of input information?






39. If window width increases - image contrast will ____.






40. What modalities are array processors useful for?






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






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






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






44. What is the name for a binary digit?






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






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






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






48. A larger matrix provides ____ pixels.






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






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