Enhanced Chest X-ray Analysis with Vision Transformers
I'll create a comprehensive solution for chest X-ray analysis using Vision Transformers (ViT) for both classification and segmentation. This solution will handle the large dataset (45GB of PNG images) and provide advanced visualization of disease localization.
Data Handling Module
First, let's create a module to efficiently handle the large dataset:
Vision Transformer Models
Now, let's implement the Vision Transformer models for classification and segmentation:
Training and Evaluation Module
Now, let's create a module for training and evaluating the models:
Visualization and Disease Localization
Let's create a module for visualizing the results and localizing diseases:
Main Script
Now, let's create a main script to tie everything together:
Inference Script
Let's create a script for inference on new images:
Utility Script for Data Preparation
Let's create a utility script for preparing the dataset:
README File
Let's create a README file to explain how to use the project:
Usage
Data Preparation
Prepare the NIH Chest X-ray Dataset for training:
Data Analysis
Analyze the dataset to understand its characteristics:
Training
Train a multi-task model for disease classification and localization:
Evaluation
Evaluate a trained model:
Visualization
Visualize disease localization:
Inference
Make predictions on new images:
Or process a directory of images:
Model Architecture
Vision Transformer for Classification
The classification model is based on the Vision Transformer (ViT) architecture, which divides the input image into patches, linearly embeds them, and processes them with a transformer encoder. The CLS token output is used for classification.
Vision Transformer for Segmentation
The segmentation model extends the ViT architecture with a decoder that transforms the patch embeddings back into a spatial representation for pixel-level segmentation.
Multi-task Learning
The multi-task model combines classification and segmentation in a single architecture, sharing the encoder between both tasks while having separate heads for classification and segmentation.
Disease Localization
The project implements two methods for disease localization:
- Attention Maps: Using the attention weights from the Vision Transformer to generate heatmaps that highlight regions the model focuses on for each disease.
- Segmentation Masks: Using the segmentation model to generate pixel-level masks for each disease.
References
- Wang, X., Peng, Y., Lu, L., Lu, Z., Bagheri, M., & Summers, R. M. (2017). ChestX-ray8: Hospital-scale Chest X-ray Database L., Lu, Z., Bagheri, M., & Summers, R. M. (2017). ChestX-ray8: Hospital-scale Chest X-ray Database and Benchmarks on Weakly-Supervised Classification and Localization of Common Thorax Diseases. IEEE CVPR.
- Dosovitskiy, A., Beyer, L., Kolesnikov, A., Weissenborn, D., Zhai, X., Unterthiner, T., ... & Houlsby, N. (2020). An Image is Worth 16x16 Words: Transformers for Image Recognition at Scale. ICLR 2021.
- Chen, J., Lu, Y., Yu, Q., Luo, X., Adeli, E., Wang, Y., ... & Zhou, Y. (2021). TransUNet: Transformers Make Strong Encoders for Medical Image Segmentation. arXiv preprint arXiv:2102.04306.
License
This project is licensed under the MIT License - see the LICENSE file for details.
Acknowledgements
- The NIH for providing the Chest X-ray Dataset
- The authors of the Vision Transformer architecture
- The PyTorch and timm communities for their excellent libraries