Automatic Skull Stripping of Rat and Mouse Brain MRI Data Using U-Net.
Automatic Skull Stripping of Rat and Mouse Brain MRI Data Using U-Net.
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DOI:
10.3389/fnins.2020.568614
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发表时间:
2020
影响因子:
4.3
通讯作者:
Shih YI
中科院分区:
文献类型:
--
作者:
Hsu LM;Wang S;Ranadive P;Ban W;Chao TH;Song S;Cerri DH;Walton LR;Broadwater MA;Lee SH;Shen D;Shih YI
Accurate removal of magnetic resonance imaging (MRI) signal outside the brain, a.k.a., skull stripping, is a key step in the brain image pre-processing pipelines. In rodents, this is mostly achieved by manually editing a brain mask, which is time-consuming and operator dependent. Automating this step is particularly challenging in rodents as compared to humans, because of differences in brain/scalp tissue geometry, image resolution with respect to brain-scalp distance, and tissue contrast around the skull. In this study, we proposed a deep-learning-based framework, U-Net, to automatically identify the rodent brain boundaries in MR images. The U-Net method is robust against inter-subject variability and eliminates operator dependence. To benchmark the efficiency of this method, we trained and validated our model using both in-house collected and publicly available datasets. In comparison to current state-of-the-art methods, our approach achieved superior averaged Dice similarity coefficient to ground truth T2-weighted rapid acquisition with relaxation enhancement and T2∗-weighted echo planar imaging data in both rats and mice (all p < 0.05), demonstrating robust performance of our approach across various MRI protocols.
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