title: Robustness and accuracy of feature-based single image 2-D-3-D registration without correspondences for image-guided intervention.
abstract: 2-D-to-3-D registration is critical and fundamental in image-guided interventions. It could be achieved from single image using paired point correspondences between the object and the image. The common assumption that such correspondences can readily be established does not necessarily hold for image guided interventions. Intraoperative image clutter and an imperfect feature extraction method may introduce false detection and, due to the physics of X-ray imaging, the 2-D image point features may be indistinguishable from each other and/or obscured by anatomy causing false detection of the point features. These create difficulties in establishing correspondences between image features and 3-D data points. In this paper, we propose an accurate, robust, and fast method to accomplish 2-D-3-D registration using a single image without the need for establishing paired correspondences in the presence of false detection. We formulate 2-D-3-D registration as a maximum likelihood estimation problem, which is then solved by coupling expectation maximization with particle swarm optimization. The proposed method was evaluated in a phantom and a cadaver study. In the phantom study, it achieved subdegree rotation errors and submillimeter in-plane ( X- Y plane) translation errors. In both studies, it outperformed the state-of-the-art methods that do not use paired correspondences and achieved the same accuracy as a state-of-the-art global optimal method that uses correct paired correspondences.
authors: Xin Kang
authors: Mehran
authors: M
authors: Armand
authors: Yoshito
authors: Y
authors: Otake
authors: Wai-Pan Yau
authors: Paul Y S
authors: PY
authors: Cheung
authors: Yong Hu
authors: Russell H
authors: RH
authors: Taylor
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D005269:Femur / Q000000981:diagnostic imaging; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015233:Models, Statistical; D019047:Phantoms, Imaging; D011859:Radiography; D025321:Surgery, Computer-Assisted
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