Patent ID: 7893940
Filing Date: 2011-02-22
Classification: A61B,G06T

Abstract:
1. A method for processing a volumetric dataset for providing close-up visualization of a subset therefrom comprising: receiving the volumetric dataset, the volumetric dataset being indicative of one of an object and a physical event; determining a quantized gradient vector for each voxel of the volumetric dataset; generating a gradient table comprising the quantized gradient vectors of the volumetric dataset; generating a secondary gradient table comprising indices pointing to respective entries in the gradient table; generating a 3D array index table, the 3D array index table comprising an index into the gradient table for each voxel of the volumetric dataset; receiving first subset data indicative of a first subset; subdividing the first subset; determining a quantized new gradient vector for each new voxel of the subdivided first subset; using the secondary gradient table determining for each new quantized gradient vector a closest quantized gradient vector of the gradient table and its index; generating a 3D array subset index table, the 3D array subset index table comprising an index into the gradient table for each voxel of the subdivided first subset; using the 3D array index table and the 3D array subset index table, rendering the volumetric dataset and the subdivided first subset, respectively; and, graphically displaying the rendered volumetric dataset and the rendered subdivided first subset.