Cerny Pavel1, 3, Marik Ivo2, 3 and Pallova Iveta1
Posters-Accepted Abstracts: Orthop Muscular Syst
Assessing the extent of a rotation of a spinal segment on a transversal plane is difficult. The objective of this study is to present a new radiographic method for the assessment of vertebral rotation from an antero-posterior (AP) view of conventional X-rays which is sufficiently precise in comparison with radiographic methods presently used in clinical practice. The absolute size of the angle of vertebral rotation is measured on X-ray film. In order to verify the method, we have constructed a special device for vertebral fixation (in vitro) with the possibility to obtain X-ray films with a predefined rotation. Results: Subsequently, the X-ray pictures of individual human vertebrae with predefined rotation values were radio-graphically measured and then compared with their actual axial rotation on the vertebral rotation device. All arithmetic averages correlate very closely with the actual values. The verification of axial vertebral rotation with the assistance of CT and MRI pictures and the evaluation of axial vertebral rotation by both the new radiographic method and with the Perdriolle method proved the satisfactory accuracy of our method. Conclusion: The main advantage of the newly presented radiographic method is the uncomplicated measurement of vertebral rotation from AP projection of conventional X-ray pictures or from its digital and printed copies. The gold standard of the new radiographic method is the evaluation of axial rotation of vertebrae to 30° approximately and the shape of vertebral bodies without severe structural deformities. The new radiographic method seems to be suitable for use in clinical practice.