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 a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






2. What determines resolution?






3. What can memory be transferred as?






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






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






6. Computer programs are called what?






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






8. 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?






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






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






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






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






13. 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?






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






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






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






17. Noise is ____ related to contrast.






18. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






19. What was the earliest computer device called?






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






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






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






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






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






25. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






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. Binary systems operate with a ___-symbol language.






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






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






30. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






31. In what time period did microchip technology come out?






32. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






34. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






36. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






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






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






39. The _____ the matrix size - the better the resolution.






40. Which type of information consists of operating instructions?






41. When was ENIAC invented?






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






43. What modalities are array processors useful for?






44. 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?






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






46. 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.






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






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






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






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