Fig. 2

Sagittal, transverse, and coronal registered images of a 30-year-old male. It shows segmented LVEN in blue and ChP in orange, scanned in upright (a) and supine (b) postures. The arrows labeled ‘G’ denote the direction of gravity. (c) A zoomed-in view of the segmentation, highlighting the gap distances along different directions. (d) A simplified 3D model of the right LVEN and ChP, illustrating their interspace hand-drawn by author using Procreate 5.3.15 (Savage Interactive Pty Ltd. Australia) and adapted from Human Anatomy Atlas 2026.00.019 (Cengage Learning, Inc. USA) retrieved on March 6, 2025 from www.visiblebody.com. (e) A 3D rendering of the LVEN and ChP in both postures in Matlab 2024a (Mathwork, USA) Volume Viewer toolbox.