A Proposed Mathematical Method to Quantify y-Axis Pelvic Rotation on the Anteroposterior Radiograph

摘要

Objective Researchers have identified potential errors in the Gonstead method’s analysis of pelvic alignment resulting from y -axis rotation of the pelvis on the anteroposterior (A-P) radiograph. The purpose of this article is to propose a method that can be used to determine the magnitude of y -axis rotation of the pelvis present on the A-P radiograph. Methods In this proposed method, measurements are obtained from the patient and from the lateral and A-P radiographs. With a mathematical method, these measurements are used with the focal film distance to calculate the degree of pelvic rotation present on an individual A-P radiograph. Results This method may help with the accuracy of measurement of pelvic y -axis rotation on the A-P radiograph. Conclusion The method proposed can be used to calculate the magnitude of pelvic y -axis rotation on an A-P radiograph. Key Indexing Terms: Radiography, Chiropractic