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 is critical to how fast the computer system can function?






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






3. 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?






4. 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.






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






6. 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?






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






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






9. 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.






10. What is high-pass filtering also called?






11. 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.






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






13. 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?






14. What is the name of the 'modern electronic computer'?






15. What is an individual matrix box or picture element?






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






17. What does DICOM stand for?






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






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






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






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






22. 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?






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






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






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






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






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






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






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






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






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






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






33. When was ENIAC invented?






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






35. A low contrast image has a ___ frequency.






36. When was ENIAC invented?






37. Which computers handle data composed of definite quantities of current?






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






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






40. Noise is ____ related to contrast.






41. What is high-pass filtering also called?






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






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






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






45. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






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






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






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






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






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







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