Penumbra is a geometric unsharpness around the periphery of an image.
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Q6: A key factor that affects the amount
Q7: Which of the following is placed between
Q8: The principal factors that affect the amount
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Q13: PBLs may also filter the x-ray beam.
Q14: Automatic collimators are known as positive beam
Q15: A factor that affects the amount of
Q16: Scattered photons from Compton interactions are of
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