Abstract #3676

Automatic venous vessel segmentation in high field, multi-echo SWI using Random Forests

Albert Rechberger^1,2, Barbara Dymerska², Karin Poljanc³, Georg Langs¹, and Simon Daniel Robinson²

¹Computational Imaging Research Lab, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria, ²High Field MR Centre, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria, ³Atominstitut, TU Wien, Vienna, Austria

A method for automatic venous vessel segmentation is presented that uses a Random Forest classifier supplied with a number of appearance and shape features computed separately from magnitude images, phase images and QSMs of a multi-echo T2*-weighted GE scan. The importance of each feature, and thus each echo, is investigated. The approach was tested on whole-brain 7T scans of four subjects, two of which were manually annotated, and was effective in segmenting both internal and surface veins.

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