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Preoperative CT of a 79-year-old subject with COPD Gold IV. (A) Axial, (B) multiplanar (MPR), and (C) color-coded (CC) CT images. Emphysema distribution scoring by three readers was as follows: 2× unilateral heterogenous and 1× bilateral intermediately heterogenous on axial images, 2× unilateral intermediately heterogenous and 1× bilateral intermediately heterogenous on MPR images and 3× bilateral heterogenous on CC images. COPD, chronic obstructive pulmonary disease.
