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 modalities are array processors useful for?






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






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






4. What modalities are array processors useful for?






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






6. What is an image that has been converted into numerical values for transmission or processing?






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






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






9. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






10. Resolution is controlled by what?






11. What does a 1 in binary code stand for?






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






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






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






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






16. Computer programs are called what?






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






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






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






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






21. What is required for collection of input information?






22. Window width and contrast have an ____ relationship.






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






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






25. 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?






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






27. What are the two most common output devices?






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






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






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






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






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






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






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






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






36. What does DICOM stand for?






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






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






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






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






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






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






43. A high contrast image has a ___ frequency.






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






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






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






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






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






49. Noise is ____ related to contrast.






50. A larger matrix provides ____ pixels.