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






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






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






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






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






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






7. 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?






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






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






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






11. What does DICOM stand for?






12. Computer programs are called what?






13. What is the name for a binary digit?






14. When was ENIAC invented?






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






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






17. Computerized digital images are described in terms of what






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






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






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






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






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






23. Resolution is controlled by what?






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






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






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






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






28. 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.






29. Noise is ____ related to contrast.






30. Which type of information consists of collected facts?






31. 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?






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






33. When was ENIAC invented?






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






35. Computer equipment is called what?






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






37. Noise is measured as what?






38. Which type of information consists of collected facts?






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






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






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






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






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






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






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






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






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






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






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






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