Real-time prediction of breast cancer sites using deformation-aware graph neural network

TL;DR

This study introduces a deformation-aware graph neural network that accurately predicts breast tumor displacement in real time, significantly improving the efficiency and precision of MRI-guided breast biopsies.

Contribution

The paper presents a novel GNN-based model that predicts breast tissue deformation during biopsy, integrating MRI-derived structural data for real-time application, which is a significant advancement over traditional finite element simulations.

Findings

Achieved 0.2 mm accuracy in tumor displacement prediction

Attained a dice similarity coefficient of 0.977 for tumor overlap

Enabled over 4,000 times faster computation than FE simulations

Abstract

Early diagnosis of breast cancer is crucial, enabling the establishment of appropriate treatment plans and markedly enhancing patient prognosis. While direct magnetic resonance imaging-guided biopsy demonstrates promising performance in detecting cancer lesions, its practical application is limited by prolonged procedure times and high costs. To overcome these issues, an indirect MRI-guided biopsy that allows the procedure to be performed outside of the MRI room has been proposed, but it still faces challenges in creating an accurate real-time deformable breast model. In our study, we tackled this issue by developing a graph neural network (GNN)-based model capable of accurately predicting deformed breast cancer sites in real time during biopsy procedures. An individual-specific finite element (FE) model was developed by incorporating magnetic resonance (MR) image-derived structural information of the breast and tumor to simulate deformation behaviors. A GNN model was then employed, designed to process surface displacement and distance-based graph data, enabling accurate prediction of overall tissue displacement, including the deformation of the tumor region. The model was validated using phantom and real patient datasets, achieving an accuracy within 0.2 millimeters (mm) for cancer node displacement (RMSE) and a dice similarity coefficient (DSC) of 0.977 for spatial overlap with actual cancerous regions. Additionally, the model enabled real-time inference and achieved a speed-up of over 4,000 times in computational cost compared to conventional FE simulations. The proposed deformation-aware GNN model offers a promising solution for real-time tumor displacement prediction in breast biopsy, with high accuracy and real-time capability. Its integration with clinical procedures could significantly enhance the precision and efficiency of breast cancer diagnosis.