Abstract
Describes the application of Bayesian theory to the problem of compensating for soft tissue deformation to improve the accuracy of image-guided surgery. A triangular surface mesh segmented from a pre-operative image is used as the input to the algorithm, and intra-operatively acquired ultrasound data compounded into a 3D volume is used to guide the deformation process. Prior probabilities are defined for the boundary points of the segmented structure based on knowledge of the direction of gravity, the position of the surface of the surgical scene and knowledge of the tissue properties. The posterior probabilities of the locations of each of the boundary points are then maximised according to Bayes' theorem. A regularisation term is included to constrain the deformation to the global structure of the object. The technique is demonstrated using a deformable phantom designed to have similar properties to human tissue. The results presented demonstrate that the algorithm was able to recover much of the deformation for a number of objects at varying depths from the source of deformation. This technique offers a convenient means of introducing prior knowledge of the operative situation into the problem of soft-tissue deformation and has the potential for greatly improving the utility of image-guided surgery. (16 References).
Original language | English |
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Title of host publication | Conference Proceedings - Lecture Notes in Computer Science (LNCS) Vol# 1935 |
Place of Publication | Berlin, Germany |
Publisher | Springer |
Pages | 588 - 597 |
Number of pages | 10 |
ISBN (Print) | 3540411895 |
Publication status | Published - 2000 |
Event | MICCAI 2000: Medical Image Computing & Computer Assisted Intervention - 3rd International Conference - Pittsburgh, PA, United States Duration: 11 Oct 2000 → 14 Oct 2000 |
Conference
Conference | MICCAI 2000: Medical Image Computing & Computer Assisted Intervention - 3rd International Conference |
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Country/Territory | United States |
City | Pittsburgh, PA |
Period | 11/10/2000 → 14/10/2000 |