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Axial slices through a 10 mm nodule at clinical dose (measurements 1 and 2) and 10% dose. Reader 1’s contours showed some disagreement due to the complexity of the spiculated nodule boundary. Proportional differences were 16.3% (Clinical 2) and −27.0% (10% dose). Again, images were reconstructed every 1 mm but this figure only shows every 2 mm for convenience.
