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 does DICOM stand for?






2. What is high-pass filtering also called?






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






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






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






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






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






8. Window width and contrast have an ____ relationship.






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






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






11. What are devices that process information?






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






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






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






15. Fluoroscopic noise mostly comes from what?






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






17. When was ENIAC invented?






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






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






20. What is required for collection of input information?






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






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






23. Noise is measured as what?






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






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






26. 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.






27. What does DICOM stand for?






28. Increased noise = _____ image contrast.






29. Noise is ____ related to contrast.






30. When was ENIAC invented?






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






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






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






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






35. 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?






36. Noise is ____ related to contrast.






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






38. What can memory be transferred as?






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






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






41. Fluoroscopic noise mostly comes from what?






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






43. The human visual range is ___ or fewer shades of gray.






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






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






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






47. A low contrast image has a ___ frequency.






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






49. 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?






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