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






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






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






4. Computers operate from ____ ____ language.






5. 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.






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






7. What is the name for a binary digit?






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






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






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






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






12. What is an individual matrix box or picture element?






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






14. Noise is measured as what?






15. Increased noise = _____ image contrast.






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






17. Which type of information consists of operating instructions?






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






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






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






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






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






23. What are the two ways detectors acquire information?






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






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






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






27. 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?






28. What determines resolution?






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






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






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






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






33. Resolution is controlled by what?






34. 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?






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






36. Computers operate from ____ ____ language.






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






38. Noise is ____ related to contrast.






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






40. What are devices that process information?






41. Which computers handle data composed of continuously varying electrical currents?






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






43. Fluoroscopic noise mostly comes from what?






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






45. 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.






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






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






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






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






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