A novel classification method for mild adolescent idiopathic scoliosis using 3D ultrasound imaging

Mild adolescent idiopathic scoliosis (AIS), with Cobb<20°, was hypothesized as the right stage to intervene prevent progression. AIS curve can be categorized into either structural or non-structural depending on spine morphology (flexibility). Using X-ray characterize curves remains clinical gold standard while compromising risks of radiation exposure. In previous works, 3D ultrasound imaging had proved reliability coronal spinal curvature measurement. This research aimed at developing a mild classification scheme through examining flexibility using imaging. For preliminary study, 90 subjects (21 ​M and 69 ​F; Age:14.5 ​± ​1.7 years old; Cobb: 18.2 ​6.4°) underwent both scanning same day. each case, clinician measured Cobbs denoted major ground truth. Bending Asymmetry Index (BAI) developed indicate presence possible curve. The coded modified Lenke for cases (m-Lenke). results were evaluated X-ray. It shown that 70.1% identical 72.0% correct detection. Lumbar-dominated distinctive performance (p ​= ​0.91, r ​0.91) against others. study demonstrated possibility ultrasound-based method classification. discrepancies could partially explained by limitations in proximal thoracic region. Subsequent studies will validate proposed larger cohort.