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






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






3. What is required for collection of input information?






4. What was the earliest computer device called?






5. Increased noise = _____ image contrast.






6. 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.






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






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






9. Computerized digital images are described in terms of what






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






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






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






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






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






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






16. Window width and contrast have an ____ relationship.






17. Which type of information consists of collected facts?






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






19. 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?






20. Resolution is controlled by what?






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






22. 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?






23. Noise is measured as what?






24. Increased noise = _____ image contrast.






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






26. What is the random background information that does not contribute to the image quality?






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






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






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






30. Fluoroscopic noise mostly comes from what?






31. What is the random background information that does not contribute to the image quality?






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






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






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






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






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






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






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






39. What does DICOM stand for?






40. What can memory be transferred as?






41. What determines resolution?






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






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






44. Digitalization of analog information (increases / reduces) the quality and quantity of information?






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






46. What does DICOM stand for?






47. Computer programs are called what?






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






49. What modalities are array processors useful for?






50. When subject contrast is high - the acquired data contrast will be ____.