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 type of information consists of collected facts?






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






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






4. 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?






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






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






7. 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?






8. A larger matrix provides ____ pixels.






9. Noise is measured as what?






10. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






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






12. Which type of information consists of collected facts?






13. 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.






14. Computerized digital images are described in terms of what






15. What can memory be transferred as?






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






17. What are the two ways detectors acquire information?






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






19. Computer equipment is called what?






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






21. What does a 0 in binary code stand for?






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






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






24. Increased noise = _____ image contrast.






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






26. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






27. What does a 1 in binary code stand for?






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






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






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






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






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






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






34. What are the two most common output devices?






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






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






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






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






39. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






40. 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.






41. Noise is ____ related to contrast.






42. What are the two ways detectors acquire information?






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






44. A high contrast image has a ___ frequency.






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






46. What can memory be transferred as?






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






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






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






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