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4 D Processing of Gated SPECT Images Using Deformable Mesh Modeling

In this work we present a new 4D approach for reducing noise in gated SPECT perfusion images while preserving accurate cardiac motion. The method is based on motioncompensated temporal smoothing using a deformable content-adaptive mesh to model cardiac motion. We use a new, fast method for initial mesh generation. This mesh is then deformed to track cardiac motion and smoothing is performed along motion tractories through the space-time coordinate system.