Fig. 4From: Correlation between lumbar spinal canal magnetic resonance imaging grading systems and parameters in lumbar spinal canal compromiseMR lumbar spinal canal and foraminal measures. A Mid-sagittal antero-posterior (AP) diameter of dural sac (white arrow) and degree of stenosis at the disc level (black arrows); B diameter of intervertebral foramen (black arrows); C the cross-sectional area of the dural sac and D right and left lateral recesses heights (black arrows)Back to article page