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






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






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






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






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






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






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






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






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






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






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






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






13. What is high-pass filtering also called?






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






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






16. Which memory can only be extracted without alteration; cannot change?






17. What modalities are array processors useful for?






18. Which type of information consists of collected facts?






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






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






21. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






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






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






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






26. Computer programs are called what?






27. 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.






28. Binary systems operate with a ___-symbol language.






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






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






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






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






33. Computers operate from ____ ____ language.






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






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






36. Computer programs are called what?






37. What is the information stored as magnetic variations referred to as?






38. Noise is measured as what?






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






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






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






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






43. A high contrast image has a ___ frequency.






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






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






46. What was the earliest computer device called?






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






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






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






50. Increased noise = _____ image contrast.