Exploring the use of biphasic quantitative thoracic computed tomography to evaluate halo-pelvic traction in managing severe adolescent idiopathic scoliosis

Preoperative HPT significantly improved spinal deformity, TLV, and pulmonary function. The alteration in CT lung tidal volume did not correlate with PFTs and was deemed an unreliable predictor of pulmonary function. The use of biphasic thoracic CT for calculating lung tidal volume did not demonstrate substantial benefits over monophasic CT and is not recommended for severe AIS.