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






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






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






4. Computer memory is often rated in terms of total ____ memory.






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






6. What determines resolution?






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






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






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






10. Which type of information consists of collected facts?






11. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






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






13. What is required for collection of input information?






14. Which type of information consists of collected facts?






15. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






16. What is the frequency response of the incoming signal called?






17. What modalities are array processors useful for?






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






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






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






21. Which computers handle data composed of definite quantities of current?






22. All medical imaging is achieved with which type of computers?






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






24. 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?






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






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






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






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






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






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






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






32. The human visual range is ___ or fewer shades of gray.






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






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






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






36. What determines resolution?






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






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






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






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






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






42. What are devices that process information?






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






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






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






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






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






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






49. A larger matrix provides ____ pixels.






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