Abstract
CNN (Convolutional Neural Network) models have been successfully used for segmentation of the left ventricle (LV) in cardiac MRI (Magnetic Resonance Imaging), providing clinical measurements. In practice, two questions arise with deployment of CNNs: (1) when is it better to use a shallow model instead of a deeper one? (2) how the size of a dataset might change the network performance? We propose a framework to answer them, by experimenting with deep and shallow versions of three U-Net families, trained from scratch in six subsets varying from 100 to 10,000 images, different network sizes, learning rates and regularization values. 1620 models were evaluated using five-fold cross-validation by loss and DICE. The results indicate that: sample size affects performance more than architecture or hyper-parameters; in small samples the performance is more sensitive to hyper-parameters than architecture; the performance difference between shallow and deeper networks is not the same across families.
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Research Data
The data used in this research is available upon registration on the LVSC website: https://www.cardiacatlas.org/challenges/lv-segmentation-challenge/.
Code Availability
The code developed in this research is intellectual property of Zerbini Foundation and FoxConn and cannot be disclosed by the authors at this moment.
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Acknowledgements
The authors thank Zerbini Foundation and FoxConn for supporting this research; A. Marco, C. Graves, D. Cardenas, J. Ferreira Jr. and R. Pereira for discussing ideas about experiments in practical scenarios; R. Moreno and M. Rebelo for initial manuscript revision and feedback.
Funding
This research was supported by Zerbini Foundation and FoxConn projects AIMED-CATI 030/2007 and FOXCONN-001/2019.
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Toledo, M.A.F., Lima, D.M., Krieger, J.E. et al. Study of CNN Capacity Applied to Left Ventricle Segmentation in Cardiac MRI. SN COMPUT. SCI. 2, 480 (2021). https://doi.org/10.1007/s42979-021-00897-x
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DOI: https://doi.org/10.1007/s42979-021-00897-x