Accurate and generalizable quantitative scoring of liver steatosis from ultrasound images via scalable deep learning

Figure 2 Image view categorization and grouping. Six ultrasound image viewpoints were used in this study. A: Left lobe longitudinal; B: Left lobe transverse; C: Right lobe intercostal; D: Lower right lobe intercostal (depicting liver/kidney contrast); E: Subcostal depicting liver/kidney contrast; F: Subcostal with hepatic veins. These views were further categorized into four groups: Left liver lobe (A and B), right liver lobe (C), liver/kidney contrast (D and E), and subcostal (E and F). LLL: Left liver lobe; RLL: Right liver lobe; LKC: Liver/kidney contrast; SC: Subcostal. Liver cartoons adapted from the DataBase Center for Life Science (https://commons.wikimedia.org/wiki/File:201405_liver.png), licensed under the Creative Commons Attribution 4.0 International[51] (Copyright permission see Supplementary material).