“AutoImPlan”: An Automated 3D THA Planning System for Whole Components of Implants with Optimizing Joint Functionalities

Abstract

This paper describes a method for automated THA planning incorporating joint functionalities. The optimal planning is formulated as maximum a posterior (MAP) estimation, which ensures the best-balance of joint functionalities and bone-implant spatial relations based on their statistical models derived from the training datasets prepared by an experienced surgeon. According to the performance evaluation, two of the three functionalities were significantly improved by incorporating the statistical model of the functionalities when compared with the previous method and all of the average values of joint functionalities were higher than the surgeon's plans. Implant Size error in 33 cases out of 37 cases were within one size. We consider these results showed a potential usefulness of the proposed method. Future work will include the clinical validation of the method and a full automation of preoperative planning.