A data- and compute-efficient chest X-ray foundation model beyond aggressive scaling. - Chong Wang; Yabin Zhang; Yunhe Gao; Maya Varma; Clemence Mottez; Faidra Patsatzi; Jiaming Liu; Jin Long; Jean-Benoit Delbrouck; Sergios Gatidis; Akshay S. Chaudhari; Curtis P. Langlotz (CoRR, 2026)