Stacked Bidirectional Convolutional LSTMs for 3D Non-contrast CT Reconstruction from Spatiotemporal 4D CT

S. van de Leemput, M. Prokop, B. van Ginneken and R. Manniesing

Medical Imaging with Deep Learning 2018.

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The imaging workup in acute stroke can be simplified by reconstructing the non-contrast CT (NCCT) from CT perfusion (CTP) images, resulting in reduced workup time and radiation dose. This work presents a stacked bidirectional convolutional LSTM (C-LSTM) network to predict 3D volumes from 4D spatiotemporal data. Several parameterizations of the C-LSTM network were trained on a set of 17 CTP-NCCT pairs to learn to reconstruct NCCT from CTP and were subsequently quantitatively evaluated on a separate cohort of 16 cases. The results show that C-LSTM network clearly outperforms basic reconstruction methods and provides a promising general deep learning approach for handling high-dimensional spatiotemporal medical data.