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






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






3. 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?






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






5. Resolution is controlled by what?






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






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






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






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






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






11. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






12. The _____ the matrix size - the better the resolution.






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






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






15. Noise is measured as what?






16. Which type of information consists of collected facts?






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






18. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






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






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






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






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






23. What is the mathematical algorithm used to create all medical images?






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






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






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






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






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






29. 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?






30. When was ENIAC invented?






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






32. What are the two ways detectors acquire information?






33. What was the earliest computer device called?






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






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






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






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






38. Computer programs are called what?






39. What is required for collection of input information?






40. What does DICOM stand for?






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






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






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






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






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






46. What is the mathematical algorithm used to create all medical images?






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






48. What determines resolution?






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






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