Dynamic SST for monitoring position and changes in kyphosis/lordosis angles

Background Spine & Surface Topography (SST) has been used to perform spine diagnostics for more than 20 years. Until recently, static scans were primarily used, as dynamic scans were not properly scientifically and clinically evaluated. Also, the hardware required to perform the dynamic scan was expensive and too slow for a proper clinical use. Due to the emergence of new technology, it is now possible to record and analyze surfaces with a frequency of up to 50 Hertz. The formetric 4D (DIERS International GmbH, Schlangenbad, Germany) static and dynamic SST system records and reconstructs the spinal position of a normally standing patient, with an additional measurement, performs the same tasks while the patient isduring walking in at a sequence of 50 fps. [1] The reconstruction of the spine is done according to follows the methods of Hierholzer / Drerup.[2]