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






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






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






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






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






6. 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.






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






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






9. When was ENIAC invented?






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






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. Noise is ____ related to contrast.






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






14. 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?






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






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






17. Which type of information consists of operating instructions?






18. What is high-pass filtering also called?






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






20. Fluoroscopic noise mostly comes from what?






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






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






23. What does a 0 in binary code stand for?






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






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






26. A low contrast image has a ___ frequency.






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






28. Computer equipment is called what?






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






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






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






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






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






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






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






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






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






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






39. 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?






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






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






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






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






44. Increased noise = _____ image contrast.






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






46. The computer either ____ or ____ selected frequencies during the filtering process.






47. What was the earliest computer device called?






48. What determines resolution?






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






50. What does a 0 in binary code stand for?