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






2. 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?






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






4. Computerized digital images are described in terms of what






5. What is required for collection of input information?






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






7. Increased noise = _____ image contrast.






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






9. 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.






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






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






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






13. When subject contrast is high - the acquired data contrast will be ____.






14. What is high-pass filtering also called?






15. 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?






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






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






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






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






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






21. A larger matrix provides ____ pixels.






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






23. Computer programs are called what?






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






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. What is the name for a binary digit?






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






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






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






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






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






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






33. 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?






34. What is an individual matrix box or picture element?






35. Computers operate from ____ ____ language.






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






37. 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.






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






39. A low contrast image has a ___ frequency.






40. What are devices that process information?






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






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






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






44. Window width and contrast have an ____ relationship.






45. 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?






46. What was the earliest computer device called?






47. What can memory be transferred as?






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






49. What is high-pass filtering also called?






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