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 measure of the differences between the data values referred to as?






2. What is critical to how fast the computer system can function?






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






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






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






6. 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?






7. Each pixel is capable of representing a wide range of what?






8. 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.






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






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






11. What changes the pixel value by addition or subtraction and controls image density?






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






13. What modalities are array processors useful for?






14. What is high-pass filtering also called?






15. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






16. What can memory be transferred as?






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






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






19. Computers operate from ____ ____ language.






20. 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?






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






22. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






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






24. Resolution is controlled by what?






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






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






27. What are devices that process information?






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






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






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






31. 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?






32. A high contrast image has a ___ frequency.






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






34. Increased noise = _____ image contrast.






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






36. Window width and contrast have an ____ relationship.






37. What is the name for a binary digit?






38. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






40. What changes the pixel value by addition or subtraction and controls image density?






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






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






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






44. In what time period did mathematical theory and solid-state electronics come out?






45. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






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






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






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






50. Who or What is responsible for density changes on a digital image? On a manual image