The severity of pulmonary emphysema investigated with fractal analysis: regional dependence.
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D017709:Fractals; D006108:Graphite; D006801:Humans; D011656:Pulmonary Emphysema / Q000000981:diagnostic imaging*; D013670:Sodium Pertechnetate Tc 99m; D015899:Tomography, Emission-Computed, Single-Photon
C056708:Technegas; D006108:Graphite; D013670:Sodium Pertechnetate Tc 99m