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 high-pass filtering also called?






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






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






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






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






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






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






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






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






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






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






12. What can memory be transferred as?






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






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






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






16. If window width increases - image contrast will ____.






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






18. What is the name for an 8-bit word?






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






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






21. Window width and contrast have an ____ relationship.






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






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






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






25. Noise is measured as what?






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






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






28. Computers operate from ____ ____ language.






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






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






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






32. 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.






33. 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?






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






35. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






36. What is the name for an 8-bit word?






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






38. If window width increases - image contrast will ____.






39. A low contrast image has a ___ frequency.






40. Computer programs are called what?






41. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






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






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






44. Window width and contrast have an ____ relationship.






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






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






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






48. What are the two most common output devices?






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






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