title: Expertise modeling for automated planning of acetabular cup in total hip arthroplasty using combined bone and implant statistical atlases.
abstract: Intraoperative robotic and computer-guided assistances are now commonly used in total hip arthroplasty (THA) for accurate execution of the preoperative plan. Although the preoperative plan to be accurately executed is critical, it is still interactively prepared in a time-consuming and subjective manner. In this paper, atlas-based approach to automated surgical planning of the acetabular cup in THA is described to stabilize its quality as well as reduce its time-consuming nature. Surgeon's expertise is embedded in two types of statistical atlases, which are constructed from training datasets of CT-based 3D plans prepared by experienced surgeons. One is a statistical shape model which encodes global spatial relationships between the patient anatomy and implant. The other is the statistical map of residual bone thickness on the implant surface, which encodes local spatial constraints of the anatomy and implant. Given the 3D pelvis shape of the patient, we formulate a procedure to determine the best size and position of the acetabular cup which satisfy the constraints derived from the two statistical atlases. We validated the proposed planning method by retrospective study using the datasets which were actually used in the THA surgery.
authors.affiliation: Graduate School of Engineering, Kobe University.
authors.forename: Itaru
authors.initials: I
authors.lastname: Otomaru
authors.forename: Kazuto
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Okada
authors.forename: Masahiko
authors.initials: M
authors.lastname: Nakamoto
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Kagiyama
authors.forename: Masaki
authors.initials: M
authors.lastname: Takao
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Sugano
authors.forename: Yukio
authors.initials: Y
authors.lastname: Tada
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Sato
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000601:surgery*; D000465:Algorithms; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods*; D001185:Artificial Intelligence; D003198:Computer Simulation; D006622:Hip Prosthesis; D006801:Humans; D008954:Models, Biological; D015233:Models, Statistical; D017755:Prosthesis Fitting / Q000379:methods; D011859:Radiography; D025321:Surgery, Computer-Assisted / Q000379:methods*