3 Consider a Rose model phantom shown below. The attenuation coefficient of the plastic is 0.2 cm. Calculate the local contrast of the holes having
3 Consider a Rose model phantom shown below. The attenuation coefficient of the plastic is 0.2 cm. Calculate the local contrast of the holes having a depth of 3 cm in the projection image. Assume there is only air in the holes. (a) -0.82 Rose Perceptibility Test (b) -1.82 Object (c) -0.33 (d) - 0.05 ' - Holes (e) 1.33 Plastic
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