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






2. Which type of information consists of collected facts?






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






4. What are the two types of information computers use?






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






6. What modalities are array processors useful for?






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






8. What does DICOM stand for?






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






10. What is the name for a binary digit?






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






12. A low contrast image has a ___ frequency.






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






14. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






15. What is a square series of boxes that gives form to the image?






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






17. What is required for collection of input information?






18. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






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






21. 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?






22. What are the two ways detectors acquire information?






23. Resolution is controlled by what?






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






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






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






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






28. What can memory be transferred as?






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






30. Computer equipment is called what?






31. What is the equation for determining gray scale bit depth?






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






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






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






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






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






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






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






39. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






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






41. What is high-pass filtering also called?






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






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






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






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






46. What are the two types of information computers use?






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






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






49. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






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