Fig. 3

(a) Coronal Cobb angle as measured on an X-ray coronal image (b) Four automated ultrasound coronal VPI, each showcasing the UCA measurements, annotated with yellow numbers, where the yellow-line segment marks the starting point of the UCA measurement, the red-line segments mark the automatically identified thoracic segments, and the blue-line segments delineate the lumbar segments. UCA: ultrasound curve angle, VPI: volume projection image.