Abstract
The work presented here is about scoliosis measurement. As the ISO16840-1 standard, which is the international standard of seated posture measurement, is a noninvasive measurement method and does not need large-scale devices, it is useful clinically for scoliosis measurement. However, to our knowledge, there has been no clinical attempt that measures scoliosis according to the ISO16840-1 standard. The purpose of this paper is to report our work that evaluates the possibility of application of the ISO16840-1 standard to thoracic scoliosis measurement. First, we measured the gradient angle of the “frontal sternum line” as defined in the ISO16840-1 standard and measured the gradient angle of the thoracic spine from X-ray pictures. Subjects were 29 persons with scoliosis. Next, we compared their gradient angles individually. As a result, it was found that measuring scoliosis according to the ISO16840-1 standard lacks validity for persons with relatively severe scoliosis (larger than 40 degrees of the ”Cobb angle”), but is valid for persons with relatively mild scoliosis (under 40 degrees of the "Cobb angle"). In conclusion, it is indicated that the ISO16840-1 standard can be applied to thoracic scoliosis for persons with mild scoliosis.
