ⓘ Cobb angle

                                     

ⓘ Cobb angle

It is defined as the greatest angle at a particular region of the vertebral column, when measured from the superior endplate of a superior vertebra to the inferior endplate of an inferior vertebra. However, the endplates are generally parallel for each vertebra, so not all sources include usage of a superior versus inferior endplate in the definition.

Unless otherwise specified it is assumed as usual to denote angles in the coronal plane, for example, projection radiography in the frontal projection. In contrast to the sagittal Cobb angle is one measured in the sagittal plane, such as on the lateral radiographs.

The Cobb angles preferably measure standing and lying reducing Cobb angles of 7°-10°.