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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Self-Calibrating Ultrasound-to-CT Bone Registration
verfasst von : Dean C. Barratt, Graeme Penney, Carolyn S. K. Chan, Mike Slomczykowski, Timothy J. Carter, Philip J. Edwards, David J. Hawkes
Erschienen in: Medical Image Computing and Computer-Assisted Intervention – MICCAI 2005
Verlag: Springer Berlin Heidelberg
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We describe a new self-calibrating approach to rigid registration of 3D ultrasound images in which
in vivo
data acquired for registration are used to simultaneously perform a patient-specific update of the calibration parameters of the 3D ultrasound system. Using a self-calibrating implementation of a point-based registration algorithm, and points obtained from ultrasound images of the femurs and pelves of human cadavers, we show that the accuracy of registration to a CT scan is significantly improved compared with a standard algorithm. This new approach provides an effective means of compensating for errors introduced by the propagation of ultrasound through soft tissue, which currently limit the accuracy of conventional methods where the calibration parameters are fixed to values determined preoperatively using a phantom.