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






2. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






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






5. What is an image that has been converted into numerical values for transmission or processing?






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






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






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






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






10. What was the earliest computer device called?






11. Fluoroscopic noise mostly comes from what?






12. What are the two most common output devices?






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






14. 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?






15. Computerized digital images are described in terms of what






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






17. What is high-pass filtering also called?






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






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






20. What determines resolution?






21. Noise is measured as what?






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






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






24. What is required for collection of input information?






25. 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.






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






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






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






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






30. A low contrast image has a ___ frequency.






31. Noise is ____ related to contrast.






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






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






34. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






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






38. What modalities are array processors useful for?






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






40. What can memory be transferred as?






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






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






43. What are the two ways detectors acquire information?






44. 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?






45. Computer memory is often rated in terms of total ____ memory.






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






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






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






49. What is an image that has been converted into numerical values for transmission or processing?






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