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 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?






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






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






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






5. What is required for collection of input information?






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






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






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






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






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






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






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






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






14. What is a square series of boxes that gives form to the image?






15. Which type of information consists of operating instructions?






16. Noise is ____ related to contrast.






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






18. Increased noise = _____ image contrast.






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






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






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






22. A larger matrix provides ____ pixels.






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






24. 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?






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






26. 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.






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






28. When was ENIAC invented?






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






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






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






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






33. Noise is measured as what?






34. Which type of information consists of collected facts?






35. Noise is measured as what?






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






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






38. A low contrast image has a ___ frequency.






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






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






41. What is high-pass filtering also called?






42. Increased noise = _____ image contrast.






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






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






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






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






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






48. Resolution is controlled by what?






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






50. 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?