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. 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?






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






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






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






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






6. 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?






7. 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.






8. Computer programs are called what?






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






10. What are the two ways detectors acquire information?






11. What is high-pass filtering also called?






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






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






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






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






16. A larger matrix provides ____ pixels.






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






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






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






20. What is the name of the 'modern electronic computer'?






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






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






23. Fluoroscopic noise mostly comes from what?






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






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






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






27. Computerized digital images are described in terms of what






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






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






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






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






33. What is the name for a binary digit?






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






35. 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?






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






37. Noise is measured as what?






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






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






40. What is required for collection of input information?






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






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






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






44. What determines resolution?






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






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






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






48. Computers operate from ____ ____ language.






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






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