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






2. When was ENIAC invented?






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






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






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






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






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






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






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






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






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






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






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






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






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






16. Fluoroscopic noise mostly comes from what?






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






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






19. 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?






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






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






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






23. 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?






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






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






26. When subject contrast is high - the acquired data contrast will be ____.






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






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






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






30. Noise is ____ related to contrast.






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






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






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






34. Which type of information consists of operating instructions?






35. What is the name for an 8-bit word?






36. Window width and contrast have an ____ relationship.






37. What are devices that process information?






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






39. What changes the pixel value by multiplication or division and controls image contrast?






40. What is the name for a binary digit?






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






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






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






44. Noise is measured as what?






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






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






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






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






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






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