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Exposure Ch 18 Quiz

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1. T\F: A higher grid ratio is better at removing scatter radiation.




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2. What are the types of linear grids?




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3. What type of grid contains the greatest amount of lead and is most effeciant in absorbing radiation?




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4. What is Canting?




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5. What is Transmission responsable for?




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6. What are Grids constructed of?




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7. What can you do to avoid grid errors?




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8. What does a crosshatched pattern look like?




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9. What does scatter do to an X-ray?




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10. What is the Potter-Bucky diaphragm, and what does it do?




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11. 1.5 an 3.5




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12. places a space between the part and the grid. a 10" gap has the same effect as a 15:1 grid




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13. True




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14. the grid is moved back and fourth by a motor during exposure.




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15. Dr. Hollis Potter. He made the grid lines run in the same direction and made them move during exposure.




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16. A circular pattern that is evergrowing and is used mostly in Japan




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17. when the tube is angled, an off level grid error occurs with a focused grid and it is the only positioning error possible with a parallel grid.




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18. GCF = mAs with grid \ mAs without grid




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19. mAs of 1 over mAs of 2 = GCF of 1 over GCF of 2




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20. the grid lines must be running in the same direction as the movement of the laser beam that is scanning the imaging plate.





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