Analysis of changes in the scoliotic spine using a three-dimensional radiographic technique.

Abstract A radiographic technique for three-dimensional analysis of changes in the scoliotic spine is presented and compared with various other techniques of this kind. Since problems of identification present greater difficulties than those of geometric definition, improving the quality of the radiographic image is considered an urgent technical requirement. Identification of measuring points in the skeletal structures is simplified by stereoscopic measurement. Equipment permitting simultaneous exposures is unnecessary for routine clinical use. It is imperative, however, to reduce the interval between exposures to a minimum in order to eliminate the risk of object deformation. The technical possibilities for routine clinical use of three-dimensional analysis of changes in the scoliotic spine and the gains to be expected from such analysis are discussed.