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. Computerized digital images are described in terms of what






2. 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?






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






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






5. 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?






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






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






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






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






10. 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?






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






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






13. Increased noise = _____ image contrast.






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






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






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






17. Computers operate from ____ ____ language.






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






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






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






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






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






23. What does DICOM stand for?






24. 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?






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






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






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






28. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






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






32. The human visual range is ___ or fewer shades of gray.






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






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






35. What determines resolution?






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






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






38. When was ENIAC invented?






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






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






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






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






44. Resolution is controlled by what?






45. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






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






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






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






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