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Beam Restricting Quiz

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1. Cones and cylinders




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2. When radiating a foot how would you use the wedge filter?




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3. What is the main purpose of beam restriction?




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4. Main purpose of Filters.




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5. Image detail or visibility of detail




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6. If collimation is increase, what will happen to pt. dose, density and contrast?




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7. Moveable lead shutters




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8. What affect do filters have on image quality (contrast and density)?




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9. Filters have an affect on scatter. T/F




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10. What are two principle ways of controling scatter radiation that reaches the IR?




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11. 2.5 required; 3.0 recommened




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12. off focus radiation (stem radiation) - electrons radiation does not hit target correctly




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13. Problem with ghosting (shadow of anatomy)




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14. Between the anode and the patient




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15. 3.0 required




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16. between the sourece and patient at collimator housing




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17. Even out density of body parts with unequal thickness




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18. Spatial Resolution




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19. aluminum or can be a combination of aluminum and copper




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20. absorbs low energy, long wavelength radiation that contributes to skin dose and leaves higher nergy, short wavelength beam which has more penetration.





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