3D image L2 distance loss

[YingdiZhang]

Thanks for the great job. I am doing a 3D medical image landmark heatmap regression task. I consider using L2 distance as loss function, how should I realize it in MONAI? I found monai.metrics.MSEMetric, may be it can be used in loss function?

[KumoLiu]

Hi @YingdiZhang, maybe you could use torch.nn.MSELoss, you can find a reference in this tutorial.

Hope it can help you, thanks!