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






2. What can memory be transferred as?






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






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






5. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






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






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






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






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






11. 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.






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






13. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






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






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






17. What is high-pass filtering also called?






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






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






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






21. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.






22. Which type of information consists of collected facts?






23. Computer programs are called what?






24. What are devices that process information?






25. 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?






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






27. What is required for collection of input information?






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






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






30. Which type of information consists of operating instructions?






31. Noise is ____ related to contrast.






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






33. What is the measure of the differences between the data values referred to as?






34. 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.






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






36. 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.






37. 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?






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






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






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






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






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






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






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






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






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






47. Fluoroscopic noise mostly comes from what?






48. What are the two ways detectors acquire information?






49. What does DICOM stand for?






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