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Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 does DICOM stand for?






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






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






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






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






6. A larger matrix provides ____ pixels.






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






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






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






10. 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?






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






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






13. Noise is ____ related to contrast.






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






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






16. A larger matrix provides ____ pixels.






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






18. What is the name for a binary digit?






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






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






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






22. Window width and contrast have an ____ relationship.






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






24. What is high-pass filtering also called?






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






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






27. Which type of information consists of collected facts?






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






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






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






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






32. What permit input/output of information to or from the CPU?






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






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






35. What are the two ways detectors acquire information?






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






37. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






38. 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?






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






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






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






42. 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.






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






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






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






46. 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?






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






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






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






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







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