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. In what time period did microchip technology come out?






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






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






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






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






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






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






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






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






10. What modalities are array processors useful for?






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






12. What type of memory storage devices are required for large amounts of data?






13. 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.






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






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






16. Computer equipment is called what?






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






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






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






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






21. 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?






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






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






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






25. What does DICOM stand for?






26. A low contrast image has a ___ frequency.






27. Which type of information consists of operating instructions?






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






29. A high contrast image has a ___ frequency.






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






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






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






33. Computerized digital images are described in terms of what






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






35. What is the name for a binary digit?






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






37. 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?






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






39. Noise is measured as what?






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






41. What are devices that process information?






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






43. 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?






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






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






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






47. A larger matrix provides ____ pixels.






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






49. A high contrast image has a ___ frequency.






50. Noise is ____ related to contrast.