Multi-Resolution Pathology-Language Pre-training Model with Text-Guided Visual Representation
Journal:
arXiv
Published Date:
Apr 26, 2025
Abstract
In Computational Pathology (CPath), the introduction of Vision-Language
Models (VLMs) has opened new avenues for research, focusing primarily on
aligning image-text pairs at a single magnification level. However, this
approach might not be sufficient for tasks like cancer subtype classification,
tissue phenotyping, and survival analysis due to the limited level of detail
that a single-resolution image can provide. Addressing this, we propose a novel
multi-resolution paradigm leveraging Whole Slide Images (WSIs) to extract
histology patches at multiple resolutions and generate corresponding textual
descriptions through advanced CPath VLM. We introduce visual-textual alignment
at multiple resolutions as well as cross-resolution alignment to establish more
effective text-guided visual representations. Cross-resolution alignment using
a multimodal encoder enhances the model's ability to capture context from
multiple resolutions in histology images. Our model aims to capture a broader
range of information, supported by novel loss functions, enriches feature
representation, improves discriminative ability, and enhances generalization
across different resolutions. Pre-trained on a comprehensive TCGA dataset with
34 million image-language pairs at various resolutions, our fine-tuned model
outperforms state-of-the-art (SOTA) counterparts across multiple datasets and
tasks, demonstrating its effectiveness in CPath. The code is available on
GitHub at: https://github.com/BasitAlawode/MR-PLIP
