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






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






3. What are devices that process information?






4. Who or What is responsible for density changes on a digital image? On a manual image






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






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






7. Fluoroscopic noise mostly comes from what?






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






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






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






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






12. Computer programs are called what?






13. What are the two most common output devices?






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






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






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






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






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






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






20. A low contrast image has a ___ frequency.






21. What can memory be transferred as?






22. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






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






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






26. What is critical to how fast the computer system can function?






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






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






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






30. Noise is measured as what?






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






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






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






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






35. What was the earliest computer device called?






36. 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?






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






38. A high contrast image has a ___ frequency.






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






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






41. When was ENIAC invented?






42. A high contrast image has a ___ frequency.






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






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






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






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






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






48. Noise is measured as what?






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






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