Automated Magnetic Resonance Image Segmentation of Spinal Structures at the L4‐5 Level with Deep Learning: 3D Reconstruction of Lumbar Intervertebral Foramen oleh Tao Chen, Zhi‐hai Su, Zheng Liu, Min Wang, Zhi‐fei Cui, Lei Zhao, Lian‐jun Yang, Wei‐cong Zhang, Xiang Liu, Jin Liu, Shu‐yuan Tan, Shao‐lin Li, Qian‐jin Feng, Shu‐mao Pang, Hai Lu