Do Synthetic Brain MRIs Reliably Improve Tumour Classification? A StyleGAN2-ADA Class-Plane Augmentation Study on BRISC 2025
This study demonstrates that while StyleGAN2-ADA-generated synthetic brain MRIs do not universally improve tumor classification across all model architectures, they provide a statistically significant accuracy boost for MobileViTV2 when using feature-space filtering at a 1:1 real-to-synthetic ratio, highlighting that augmentation utility depends on the specific classifier and data configuration rather than visual fidelity alone.