Abstract
Cardiac MR image segmentation is essential for the morphological and functional analysis of the heart. Inspired by how experienced clinicians assess the cardiac morphology and function across multiple standard views (i.e. long- and short-axis views), we propose a novel approach which learns anatomical shape priors across different 2D standard views and leverages these priors to segment the left ventricular (LV) myocardium from short-axis MR image stacks. The proposed segmentation method has the advantage of being a 2D network but at the same time incorporates spatial context from multiple, complementary views that span a 3D space. Our method achieves accurate and robust segmentation of the myocardium across different short-axis slices (from apex to base), outperforming baseline models (e.g. 2D U-Net, 3D U-Net) while achieving higher data efficiency. Compared to the 2D U-Net, the proposed method reduces the mean Hausdorff distance (mm) from 3.24 to 2.49 on the apical slices, from 2.34 to 2.09 on the middle slices and from 3.62 to 2.76 on the basal slices on the test set, when only 10% of the training data was used.
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Acknowledgements
This work was supported by the SmartHeart EPSRC Programme Grant (EP/P001009/1). Steffen Petersen acknowledges support from the National Institute for Health Research Barts Biomedical Research Centre. The cardiac multi-view image dataset has been provided under UK Biobank Access Application 18545.
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Chen, C., Biffi, C., Tarroni, G., Petersen, S., Bai, W., Rueckert, D. (2019). Learning Shape Priors for Robust Cardiac MR Segmentation from Multi-view Images. In: Shen, D., et al. Medical Image Computing and Computer Assisted Intervention – MICCAI 2019. MICCAI 2019. Lecture Notes in Computer Science(), vol 11765. Springer, Cham. https://doi.org/10.1007/978-3-030-32245-8_58
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DOI: https://doi.org/10.1007/978-3-030-32245-8_58
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