Hypernetwork-Ensemble Learning of Segmentation Probability for Medical Image Segmentation with Ambiguous Labels

Overview

Hypernet-Ensemble Learning of Segmentation Probability for Medical Image Segmentation with Ambiguous Labels

The implementation of Hypernet-Ensemble Learning of Segmentation Probability for Medical Image Segmentation with Ambiguous Labels.

We aim to improve the segmentation probability estimation of DL networks for medical image segmentation that often suffers from the ambiguity in human annotations and anatomical/pathological structures using the hypernetwork ensemble strategy with the varying Tversky loss.

Human Annotations of Ambiguous Stroke Lesions!

Estimated Segmentation Probability Map!

Segmentation Label Estimation with Different Threshold!

Hypernetwork Architecture

Hypernetwork Architecture!

The overall hypernetwork architecture shown above is implemented in networks/hyper_resunet.py.

Hyperconvolution Blocks!

The hyperconvolution blocks are implemented in blocks/hyper_convolution.py.

Usage

The codes are implemented with the MONAI framework (https://monai.io/), PyTorch (https://pytorch.org/), and PyTorch Lightning (https://www.pytorchlightning.ai/).

Requirements

pip install -r requirements.txt

Example Dependencies

  • monai=0.7.0
  • torch=1.9.1
  • nibabel=3.2.1

Training

The hypernetwork and optimizer is wrapped with PyTorch Lightning (lightning_modules/module_hyper_resunet.py).

Please see train.py for setting up the network parameters and training configurations.

Inference

Please see predict.py for inference.

The network parameters need to be the same with a trained network.

Contact

Please contact Sungmin Hong (MGH, HMS [email protected]) if you have questions on the codes or the paper.

Owner
Sungmin Hong
[email protected]/HMS. Strive to tackle messy, noisy, and unorganized real world clinical
Sungmin Hong
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