Murphy MP, et al. - A retrospective study of plain radiographs was done on 160 hips of 141 patients who underwent primary THA in order to propose two novel methods, the Area and Orthogonal methods, which had been designed to maximize the utilization of readily recognizable points while maintaining the same trigonometric principles. The 160 anteroposterior pelvis films exhibited that the proposed Area method was statistically distinct from those defined by Widmer and Lewinnek. They gave the greatest inter- and intraobserver reliability, and used less time to finish. Moreover, 21 available CT 3D reconstructions demonstrated the Area method achieved the greatest Pearson’s correlation coefficient and least statistical variation from CT with a mean within 1° of CT-3D reconstruction between ranges of 1° to 30° of measured radiological anteversion. Thus, results supported that the proposed Area method is the most reliable, exact, and fast. However, they did not support any statistical superiority of the proposed Orthogonal method in comparison with those with the Widmer or Lewinnek method.