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 determines resolution?






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






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






4. Computers operate from ____ ____ language.






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






6. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






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






10. When was ENIAC invented?






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






12. 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.






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






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






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






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






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






18. 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?






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






20. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






21. What is required for collection of input information?






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






23. What are the two most common output devices?






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






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






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. Computer programs are called what?






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






29. Which type of information consists of collected facts?






30. 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?






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






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






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






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






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






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






37. 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?






38. When was ENIAC invented?






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






40. 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?






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






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






43. Which memory can only be extracted without alteration; cannot change?






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






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






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






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






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






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






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