Automatic annotation of hip anatomy in fluoroscopy for robust and efficient 2D/3D registration.

Purpose: Fluoroscopy is the standard imaging modality used to guide hip surgery and is therefore a natural sensor for computer-assisted navigation. In order to efficiently solve the complex registration problems presented during navigation, human-assisted annotations of the intraoperative image are typically required. This manual initialization interferes with the surgical workflow and diminishes any advantages gained from navigation.

Pose Estimation of Periacetabular Osteotomy Fragments With Intraoperative X-Ray Navigation.

Objective: State-of-the-art navigation systems for pelvic osteotomies use optical systems with external fiducials. In this paper, we propose the use of X-ray navigation for pose estimation of periacetabular fragments without fiducials.

Methods: A two-dimensional/three-dimensional (2-D/3-D) registration pipeline was developed to recover fragment pose.