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. If window width increases - image contrast will ____.






2. Noise is measured as what?






3. Digital detectors are capable of producing ______ shades of gray.






4. When was ENIAC invented?






5. Noise is ____ related to contrast.






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






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






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






9. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






10. Computer equipment is called what?






11. 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?






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






13. Computerized digital images are described in terms of what






14. Noise is ____ related to contrast.






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






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






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






18. A high contrast image has a ___ frequency.






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






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






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






22. In what time period did microchip technology come out?






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






24. 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?






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






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






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






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






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






30. Window width and contrast have an ____ relationship.






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






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






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






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






35. 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?






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






37. What does DICOM stand for?






38. A high contrast image has a ___ frequency.






39. What is high-pass filtering also called?






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






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






42. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






44. What are the two most common output devices?






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






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






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






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






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






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