Prior Guided Transformer for Accurate Radiology Reports Generation

Area of Science:

• Medical Imaging
• Artificial Intelligence
• Natural Language Processing

Background:

• Accurate radiology report generation is crucial for clinical decision-making.
• Current automated methods often struggle to incorporate domain-specific prior knowledge effectively.
• Integrating prior knowledge can potentially improve the accuracy and clinical relevance of generated reports.

Purpose of the Study:

• To propose a novel Prior Guided Transformer (PGT) model for accurate radiology report generation.
• To effectively integrate prior knowledge into the report generation process using an Additive Gaussian model and sparse attention.
• To enhance the fusion of visual, language, and prior embeddings for improved report accuracy.

Main Methods:

• Utilized a convolutional neural network and transformer encoder to extract radiograph patch features.
• Employed an Additive Gaussian model for unsupervised prior knowledge representation with sparse attention.
• Developed a Prior Guided Attention mechanism in the decoder to fuse multi-modal embeddings.
• Generated radiology reports by probabilistically sampling prior embeddings.

Main Results:

• The proposed Prior Guided Transformer achieved superior performance compared to state-of-the-art methods.
• Experiments were conducted on two publicly available radiology datasets.
• The results demonstrate the effectiveness of incorporating prior knowledge for accurate report generation.

Conclusions:

• The Prior Guided Transformer is an effective approach for automated radiology report generation.
• Integrating prior knowledge significantly improves the accuracy of generated radiology reports.
• This method shows promise for clinical applications requiring high-fidelity medical report automation.