Fig. 2

Axial (left), coronal (middle) and sagittal (right) slices for the CT-AC (first and second row) and the averaged (30–60 min) SUV (third row) and Pat^slope (fourth row) parametric images of a representative COPD patient (M, 66 years). The axial slice was chosen in the upper part of the lung as being representative of tissue loss in COPD. CT-AC: computed tomography attenuation correction, SUV: standardised uptake value