Max Prost, Joachim Windolf, Markus Rafael Konieczny

December 2021, Volume 30, Issue 12, pp 3490 - 3497 Original Article Read Full Article 10.1007/s00586-021-06945-7

First Online: 31 July 2021


There is no data that show if it is possible to determine if a curve is structural or non-structural or to assess flexibility of an adolescent idiopathic scoliosis (AIS) by recumbent images like a CT scan (CTS) instead of bending radiographs (BR). We investigated if the results of BR may be compared to those of CTS.


We retrospectively analyzed prospectively collected data of patients with AIS in whom a selective spinal fusion was performed and in whom a CTS, BR, and full spine x-rays were made preoperatively. We measured the Cobb angles of the main and the minor curve in full spine x-ray, BR, and CTS.


After applying inclusion and exclusion criteria, 39 patients were included. We found a strong correlation (r = 0.806, p 


Spinal curves showed a significant correlation between bending radiographs and recumbent images (CTS). In our group of patients, a Cobb angle of the minor curve of less than 35 degrees in the CTS indicated that this minor curve was non-structural.

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