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. 2017 Jul 21;8(4):471–485. doi: 10.14336/AD.2016.1215

Figure 5. Post-processing imaging techniques: quantification of emphysema and air-trapping.

Figure 5.

Quantification in a 73 years-old woman with COPD by using dedicated software of semi-automatic lung volume segmentation (Franhofer MeVis, Germany, DE). Volume rendering CT images at end-inspiration (A) and end-expiration (B) show pulmonary lobes with different colours and low attenuation areas as orange dots. At end-inspiration (A) the dots represent areas with attenuation values below -950 HU consistent with emphysema, whereas at end-expiration (B) the dots represent areas with attenuation values below -856 HU, consistent with air-trapping and emphysema.