The use of instant moiré photographs to reduce exposure from scoliosis radiographs.

A total of 258 patients with some degree of idiopathic scoliosis was monitored with both radiographs and moiré photography to determine the degree of progression of spinal curvature. The use of polaroid photography to document moiré fringe patterns proved to be a rapid and useful process for placing an instant photographic record in patient charts while conducting routine physical examinations. Standardization of procedures for making and evaluating moiré photographs reduced patient exposure to X-rays.