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






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






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






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






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






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






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






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






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






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






11. Computer programs are called what?






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






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






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






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






16. What is the name for a binary digit?






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






18. What is the 'noisiest' component of a digital system?






19. A high contrast image has a ___ frequency.






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






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






22. 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?






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






24. Computers operate from ____ ____ language.






25. What input device do radiographers use on a normal basis?






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






27. The computer either ____ or ____ selected frequencies during the filtering process.






28. What provides specific instructions for calculations and sequential steps to be followed?






29. A low contrast image has a ___ frequency.






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






31. Fluoroscopic noise mostly comes from what?






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






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






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






35. What is critical to how fast the computer system can function?






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






37. What modalities are array processors useful for?






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






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






40. What are devices that process information?






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






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






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






44. Increased noise = _____ image contrast.






45. What can memory be transferred as?






46. Which type of information consists of operating instructions?






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






48. When was ENIAC invented?






49. Which type of information consists of operating instructions?






50. A larger matrix provides ____ pixels.