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Abstract #3031

Development of a Three-Dimensional Visualization & Atlasing Tool for Pulmonary Gas Distribution from Hyperpolarized 3He Magnetic Resonance Imaging

Andrew Wheatley1, Usaf Aladl1, Igor Gyacskov1, Aaron Fenster1,2, Grace Parraga1,2

1Imaging, Robarts Research Institute, London, Ontario, Canada; 2Department of Medical Biophysics, the University of Western Ontario, London, Ontario, Canada

Until the emergence of hyperpolarized 3He MRI, it has been difficult to quantify and visualize the structure/function relationships of the lung with high spatial and temporal resolution. Our objective was to generate, from static ventilation 3He MRI images of COPD, three-dimensional volumetric lung models that incorporate k-means clustering of differential pixel intensities across the lung that represent partial, fully and non-ventilated regions. We developed software and a visualization environment to generate a set of fully rotational 3D surfaces of the regional ventilation patterns for individual COPD subjects and an image-based lung atlas that combines the functional features of 55 COPD subjects.