Xiaoyu Liu1, Scott lipnick1, James Sayre1, Shida Banakar1, Nanette Debruhl1, Michael Albert Thomas1
1Radiology, UCLA, David Geffen School of Medicine, Los Angeles, CA, USA
Magnetic Resonance Spectroscopy (MRS) allows noninvasive measurements of the concentration of metabolites in human breast in vivo. Two-dimensional (2D) MRS has improved resolution than one-dimensional (1D) MRS due to the additional J-coupling information in the second dimension. 2D COSY of breast tissues showed several metabolite and lipid ratios that are significantly different between different breast tissues. In this study we use classification and regression tree (CART) analysis for classification of four different breast tissues (malignant tumor, benign tumor, healthy fatty and healthy glandular tissues) based on the metabolite ratios from 2D COSY of breast tissues in vivo.