Nowadays, spinal surgery should never be performed without taking these parameters into account, because the success of the surgery will depend on having applied the technique that is right one for the pathology and right for the shape of spine of the patient suffering the pathology.
The study of the equilibrium or overall balance of the spine has become fundamental for modern spinal surgery. However, conventional radiological examinations are not effective for studying this issue. In fact, there have always been x-rays for the study of scoliosis (scoliograms), but with a side-view image that does not show the posture of the whole body or the pelvis and, therefore, is not useful for calculating the spinopelvic parameters.
It has long been known, that in the detection and monitoring of juvenile scoliosis, a full-body standing x-ray is important to make a correct diagnosis. Since a spinal MRI or CT scan is performed with the patient lying down, they do not provide complete information, such as the degree of scoliosis, which can only be determined if the patient is standing.
Traditionally, in order to obtain the correct visualization of these structures, multiple high-dose x-rays had to be taken (and still are), exposing the patient to too much radiation and obtaining a poor result for analysis. The EOS technology now provides a solution to this problem.