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. 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?






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






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






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






5. Noise is measured as what?






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






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






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






9. What type of memory storage devices are required for large amounts of data?






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






11. Digitalization of analog information (increases / reduces) the quality and quantity of information?






12. Fluoroscopic noise mostly comes from what?






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






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






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






16. What was the earliest computer device called?






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






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






19. Increased noise = _____ image contrast.






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






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






22. What is the name for a binary digit?






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






24. 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?






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






26. Computer memory is often rated in terms of total ____ memory.






27. Digitalization of analog information (increases / reduces) the quality and quantity of information?






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






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. 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?






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






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






33. What is high-pass filtering also called?






34. Computer equipment is called what?






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






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






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






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






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






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






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






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






43. A high contrast image has a ___ frequency.






44. Computer programs are called what?






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






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






47. Resolution is controlled by what?






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






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






50. A low contrast image has a ___ frequency.