What does this research mean for the field?

napariTFM provides an accurate and accessible open-source platform for traction force and monolayer stress microscopy, achieving correlation coefficients above 0.9 in synthetic dataset validations. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To develop an accessible open-source plugin for analyzing cellular forces using traction force and monolayer stress microscopy.

March 18, 2026Open Access

napariTFM: An open-source tool for traction force microscopy and monolayer stress microscopy

Key Result

napariTFM provides an open-source platform for traction force and monolayer stress microscopy, demonstrating excellent accuracy with correlation coefficients above 0.9 in synthetic datasets.

Key Points

To develop an accessible open-source plugin for analyzing cellular forces using traction force and monolayer stress microscopy.
Developed napariTFM plugin for the napari image viewer
Integrated TV-L1 optical flow for displacement analysis
Utilized Fourier Transform Traction Cytometry for force reconstruction
Employed finite element methods for stress calculation
Validated accuracy using synthetic datasets with known values
Achieved correlation coefficients above 0.9 for accuracy in synthetic datasets
Enabled real-time parameter adjustments during analysis
Demonstrated software capabilities through optogenetic contractility experiments in cell doublets

Structured PICO

Population

Synthetic datasets and cell doublets (optogenetic contractility experiments)

Intervention

napariTFM software plugin

Outcome

Accuracy of displacement analysis, force reconstruction, and stress calculation

napariTFM provides an accessible, open-source platform for quantitative studies of cellular force generation and transmission.

Main Result

Absolute Event Rate: 0% vs 0%

Abstract

Cellular force generation and transmission are fundamental processes driving cell migration, division, tissue morphogenesis, and disease progression. Traction Force Microscopy (TFM) and Monolayer Stress Microscopy (MSM) have emerged as essential techniques for quantifying these mechanical processes, but current software solutions are fragmented across multiple platforms with varying degrees of usability and accessibility. Here, we present napariTFM, a comprehensive open-source plugin for the napari image viewer that integrates state-of-the-art algorithms for both TFM and MSM analysis within an intuitive graphical user interface. The software implements TV-L1 optical flow for displacement analysis, Fourier Transform Traction Cytometry (FTTC) for force reconstruction, and finite element methods for stress calculation, supporting both single-frame and time-series analysis of 2D microscopy data. Systematic validation using synthetic datasets with known ground truth values demonstrated excellent accuracy, with correlation coefficients above 0.9 for most situations. Real-time parameter adjustment and immediate visualization capabilities enable interactive optimization of analysis parameters and quality assessment during processing. Finally, we demonstrate the software’s capabilities through analysis of optogenetic contractility experiments in cell doublets. napariTFM addresses critical gaps in the cellular mechanics software ecosystem by combining algorithmic rigor with practical usability, providing the research community with an accessible platform for quantitative studies of cellular force generation and transmission.