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Abstract #2729

A Comparison of Deep Learning Convolutional Neural Networks for Liver Segmentation in Radial Turbo Spin Echo Images

Lavanya Umapathy1, Mahesh Bharath Keerthivasan1, Jean-Philippe Galons2, Wyatt Unger2, Diego Martin2, Maria Altbach2, and Ali Bilgin1,3

1Electrical and Computer Engineering, University of Arizona, Tucson, AZ, United States, 2Medical Imaging, University of Arizona, Tucson, AZ, United States, 3Biomedical Engineering, University of Arizona, Tucson, AZ, United States

Motion-robust 2D-RADTSE can provide a high-resolution composite, T2-weighted images at multiple echo times (TEs), and a quantitative T2 map, all from a single k-space acquisition. We use deep-learning CNN for segmentation of liver in abdominal RADTSE images. An enhanced UNET architecture with generalized dice loss based objective function was implemented. Three nets were trained, one for each image type obtained from the sequence. On evaluating net performances on the validation set, we found that nets trained on TE images or T2 maps had higher average dice scores than the one trained on composites, implying information regarding T2 variation aids in segmentation.

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