Figure 1From: Quantitative lung SPECT applied on simulated early COPD and humans with advanced COPD A cross-section of the phantom visualising selected tissues, respiratory motion and heartbeat. A coronal slice of the phantom in units of linear attenuation coefficients, together with used grey scale ranging from μ = 0 cm−1 as black to μ = 0.219 cm−1 as white.Back to article page