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. Resolution is controlled by what?






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






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






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






5. Noise is measured as what?






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






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






8. Computer programs are called what?






9. 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?






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






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






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






13. Noise is measured as what?






14. 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?






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






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






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






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






19. 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.






20. What is high-pass filtering also called?






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






22. 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?






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






24. Which type of information consists of collected facts?






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






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






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






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






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






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






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






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






33. Which type of information consists of operating instructions?






34. What changes the pixel value by multiplication or division and controls image contrast?






35. What are devices that process information?






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






37. What does DICOM stand for?






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






39. Window width and contrast have an ____ relationship.






40. What can memory be transferred as?






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






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






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






44. A larger matrix provides ____ pixels.






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






46. Changes in window width are sometimes called gray scale ____ or ____.






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






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






49. Noise is ____ related to contrast.






50. Fluoroscopic noise mostly comes from what?