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Several studies have attempted to estimate the approximate distance from the skin-to-epidural space using different imaging modalities (computed tomography [CT], ultrasound, and magnetic resonance imaging [MRI]) and direct needle measurements. The objective of our study was to compare the distance from the skin to the epidural space (SED) at multiple levels, focusing on T 6-7 , T 9-10 , and L 2-3 using MRI.

Comparison of the skin-to-epidural space distance at the thoracic and lumbar levels in children using magnetic resonance imaging