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. 2021 Nov 10;4(1):e210211. doi: 10.1148/ryai.2021210211

Figure 6:

Receiver operating characteristic curves and area under the receiver operating characteristic curves (AUCs) for each lung deformable registration algorithm for predicting Global Initiative for Chronic Obstructive Lung Disease (GOLD) stages with use of percentage emphysema low attenuation area, or %EM-LAA, and percentage air trapping–attenuation difference map, or %AT-ADM, as predictors. Algorithms showed near-identical performance for each respective GOLD stage. Areas under the receiver operating characteristic curves for the algorithm for performing deformable registration of lung CT (LungReg) were not significantly different from those for symmetric diffeomorphic registration (iterative) (SyN), which suggests that LungReg air trapping measurements could supplant SyN air trapping measurements.

Receiver operating characteristic curves and area under the receiver operating characteristic curves (AUCs) for each lung deformable registration algorithm for predicting Global Initiative for Chronic Obstructive Lung Disease (GOLD) stages with use of percentage emphysema low attenuation area, or %EM-LAA, and percentage air trapping–attenuation difference map, or %AT-ADM, as predictors. Algorithms showed near-identical performance for each respective GOLD stage. Areas under the receiver operating characteristic curves for the algorithm for performing deformable registration of lung CT (LungReg) were not significantly different from those for symmetric diffeomorphic registration (iterative) (SyN), which suggests that LungReg air trapping measurements could supplant SyN air trapping measurements.