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. A high contrast image has a ___ frequency.






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






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






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






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






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






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






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






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






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






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






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






13. Fluoroscopic noise mostly comes from what?






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






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






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






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






18. Computerized digital images are described in terms of what






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






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






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






22. What is the measure of the differences between the data values referred to as?






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






24. A larger matrix provides ____ pixels.






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






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






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






28. What determines resolution?






29. 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.






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






31. What was the earliest computer device called?






32. A low contrast image has a ___ frequency.






33. What does DICOM stand for?






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






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






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






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






38. Computer programs are called what?






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






40. Noise is measured as what?






41. Which type of information consists of operating instructions?






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






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






44. What modalities are array processors useful for?






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






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






47. What is the name for a binary digit?






48. What was the earliest computer device called?






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






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