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






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






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






4. Noise is measured as what?






5. A larger matrix provides ____ pixels.






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






7. A low contrast image has a ___ frequency.






8. Noise is ____ related to contrast.






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






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






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






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






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






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






15. What was the earliest computer device called?






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






17. If the window level increases - density will _____.






18. What determines resolution?






19. 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?






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






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






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






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






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






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






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






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






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






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






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






31. What can memory be transferred as?






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






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






34. 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.






35. Fluoroscopic noise mostly comes from what?






36. What is the frequency response of the incoming signal called?






37. What is the frequency response of the incoming signal called?






38. What modalities are array processors useful for?






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






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






41. 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?






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






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






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






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. What are devices that process information?






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






49. What is high-pass filtering also called?






50. Increased noise = _____ image contrast.