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. If window width increases - image contrast will ____.






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






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






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






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






6. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






8. What is the name for a binary digit?






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






10. A larger matrix provides ____ pixels.






11. What 3 things were required prior to digital computer applications in medical imaging?






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






13. What are the two most common output devices?






14. Computer equipment is called what?






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






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






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






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






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






20. 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?






21. 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.






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






23. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






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. A larger matrix provides ____ pixels.






26. What is required for collection of input information?






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






28. Changes in window width are sometimes called gray scale ____ or ____.






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






30. When was ENIAC invented?






31. A low contrast image has a ___ frequency.






32. Changes in window width are sometimes called gray scale ____ or ____.






33. 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?






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






35. Fluoroscopic noise mostly comes from what?






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






37. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






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






39. 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?






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






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






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






43. Fluoroscopic noise mostly comes from what?






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






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






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






47. What modalities are array processors useful for?






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






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






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