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--- |
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language: en |
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tags: |
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- medical-imaging |
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- mri |
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- self-supervised |
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- 3d |
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- neuroimaging |
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license: apache-2.0 |
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library_name: pytorch |
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datasets: |
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- custom |
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--- |
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# SimCLR-MRI Pre-trained Encoder (SeqAug) |
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This repository contains a pre-trained 3D CNN encoder for MRI analysis. The model was trained using contrastive learning (SimCLR) with Bloch equation simulations to generate multi-contrast views of the same anatomy. |
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## Model Description |
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The encoder is a 3D CNN with 5 convolutional blocks (64, 128, 256, 512, 768 channels), outputting 768-dimensional features. This SeqAug variant treats different simulated MRI sequences as strong augmentations during contrastive learning, encouraging sequence-robust representations. |
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### Training Procedure |
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- **Pre-training Data**: 51 qMRI datasets (22 healthy, 29 stroke subjects) |
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- **Augmentations**: Bloch simulation-based sequence augmentation + standard transformations |
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- **Input**: 3D MRI volumes (96×96×96) |
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- **Output**: 768-dimensional feature vectors |
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## Intended Uses |
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This encoder is particularly suited for: |
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- Cross-sequence transfer learning |
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- Multi-contrast MRI analysis |
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- Sequence-robust feature extraction |
