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






2. 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?






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






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






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






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






7. Computers operate from ____ ____ language.






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






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






10. Which type of information consists of collected facts?






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






12. What type of memory storage devices are required for large amounts of data?






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






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






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






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






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






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






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






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






21. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






37. What does DICOM stand for?






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






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






40. Which type of information consists of operating instructions?






41. 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.






42. Fluoroscopic noise mostly comes from what?






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






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






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






46. What is required for collection of input information?






47. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






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






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






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