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 a binary digit?






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






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






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






5. What are devices that process information?






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






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






8. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






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






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






11. 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.






12. What does DICOM stand for?






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






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






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






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






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






18. Medical imaging is often achieved from information that has been processed by what?






19. Computers operate from ____ ____ language.






20. When was ENIAC invented?






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






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






23. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






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






26. What is the name for a binary digit?






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






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






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






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






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






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






33. When was ENIAC invented?






34. What are the 3 classifications of digitized image filters?






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






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






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






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






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






40. Noise is ____ related to contrast.






41. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






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






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






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






45. Medical imaging is often achieved from information that has been processed by what?






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






47. Increased noise = _____ image contrast.






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






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






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