Fig. 6From: Establishment of a risk prediction model for residual low back pain in thoracolumbar osteoporotic vertebral compression fractures after percutaneous kyphoplastyThe TPA at level L3 was measured on CT by tracing the bilateral psoas major muscle outline. A sagittal views of Lumbar CT (L3, yellow line); B cross-sectional views of Lumbar CT (TPA, red fill)Back to article page