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Communication Dans Un Congrès Année : 2003

3D nonlinear PET-CT image registration algorithm with constrained Free-Form Deformations

Résumé

This paper presents a 3D nonlinear PET-CT image registration method guided by a B-Spline Free-Form Deformations (FFD) model, dedicated to thoracic and abdominal regions. It is divided into two stages: one FFD-based registration of structures that can be identified in both images; and a whole-image intensity registration step constrained by the FFD computed during the first step. Different similarity criteria have been adopted for both stages: Root Mean Square (RMS) to register recognized structures and Normalized Mutual Information (NMI) for optimizing the whole-image intensity stage. Structure segmentation is performed according to a hierarchical procedure, where the extraction of a given structure is driven by information derived from a simpler one. This information is composed of spatial constraints and expressed by the means of regions of interest, in which a 3D simplex mesh deformable model based method is applied. The results have been very positively evaluated by three medical experts.
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Dates et versions

hal-01930355 , version 1 (21-11-2018)

Identifiants

  • HAL Id : hal-01930355 , version 1

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Oscar Camara, Olivier Colliot, Gaspar Delso, Isabelle Bloch. 3D nonlinear PET-CT image registration algorithm with constrained Free-Form Deformations. 3rd IASTED International Conference on Visualization, Imaging, and Image Processing (VIIP 2003), 2003, Benalmadena, Spain. ⟨hal-01930355⟩
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