SYSTEM AND METHOD FOR GENERATING PERFUSION FUNCTIONAL MAPS FROM TEMPORALLY RESOLVED HELICAL COMPUTED TOMOGRAPHIC IMAGES

摘要

Various methods and systems are described for obtaining at least one CTA perfusion functional map from Time Resolved Helical CTA (TRH-CTA) image data. At least one processor may be configured to preprocess the TRH-CTA helical image data to generate preprocessed TRH-CTA helical image data; generate time density curve data for a plurality of voxels from the preprocessed TRH-CTA helical image data foran axial imaging slice, where the time density curve data comprise intensity values for different phases of the preprocessed TRH-CTA helical image data arrangedsequentially in time; generate at least one perfusion functional map for the axial imaging slice by at least one of: (1) applying at least one mapping function to differentphases of the time density curve data corresponding to the axial imaging slice; (2)applying a deconvolution method to the time density curve data; and (3) applying anon-deconvolution method to the time density curve data; and perform spatial filteringon the perfusion functional map. A display may be used to display at least one filtered perfusion functional map.