Fig. 3From: Optimization of pulmonary emphysema quantification on CT scans of COPD patients using hybrid iterative and post processing techniques: correlation with pulmonary function testsProfile plot of %LAA-950 for the seven levels within ISP6, ISP7 with and without de-noising. %LAA-950 percentage of lung voxels with attenuation < − 950 Hounsfield units, ISP IntelliSpace Portal, ISP7d ISP7 with denoisingBack to article page