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. Author manuscript; available in PMC: 2016 Jul 1.

Published in final edited form as: Lung Cancer. 2015 Apr 9;89(1):43–49. doi: 10.1016/j.lungcan.2015.03.023

Graphical representation of the PET/CT volumetric prognostic (PVP) index as defined by Eq. (1). For patients within a single TNM stage, the PVP index is linearly related to ln(MTV_WB), with a slope of 0.360. For a given value of ln(MTV_WB), advanced stage yields greater PVP index. The values on the x-axis correspond to the 5^th, 25^th, 50^th, 75^th, and 95^th percentiles of ln(MTV_WB) for the entire study cohort.