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 name for an 8-bit word?






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






3. Resolution is controlled by what?






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






5. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






8. 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?






9. Fluoroscopic noise mostly comes from what?






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






11. A low contrast image has a ___ frequency.






12. What is high-pass filtering also called?






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






14. What permit input/output of information to or from the CPU?






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






16. What does DICOM stand for?






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






18. Computer equipment is called what?






19. What can memory be transferred as?






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






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






22. What does a 1 in binary code stand for?






23. Which type of information consists of collected facts?






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






25. What modalities are array processors useful for?






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






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






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






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






30. 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.






31. A high contrast image has a ___ frequency.






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






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






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






35. What is the 'noisiest' component of a digital system?






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






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






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






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






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






41. What permit input/output of information to or from the CPU?






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






43. Computerized digital images are described in terms of what






44. A larger matrix provides ____ pixels.






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






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






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






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






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






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