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Residual volume data.
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Residual volume (RV). ΔRV: difference between Plethysmographic-RV (p-RV) and CT-RV. In cases where difference was not provided, the author calculated it as: ΔRV = P-RV – CT-RV. Percent Deviation = (ΔRV/P-RV)*100. Each colour represents a patient group. Blue: mixed. Green: healthy. Black: obstructive [6–13,25].
