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 are devices that process information?






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






3. Noise is measured as what?






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






5. What was the earliest computer device called?






6. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






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






8. What are the two ways detectors acquire information?






9. The ____ is the heart of the computer while the ___ is the vessels.






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






11. Increased noise = _____ image contrast.






12. 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.






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






14. 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?






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






16. Computerized digital images are described in terms of what






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






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






19. A low contrast image has a ___ frequency.






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






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






22. A high contrast image has a ___ frequency.






23. 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?






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






25. What are the two ways detectors acquire information?






26. Computer equipment is called what?






27. Noise is ____ related to contrast.






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






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






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






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






32. What is high-pass filtering also called?






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






34. Window width and contrast have an ____ relationship.






35. 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.






36. What is required for collection of input information?






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






38. What are the two most common output devices?






39. 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?






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






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






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






43. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






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






45. Fluoroscopic noise mostly comes from what?






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






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






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






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






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