SynthRAD2025 Grand Challenge dataset: generating synthetic CTs for radiotherapy. - Adrian Thummerer; Erik van der Bijl; Arthur Jr Galapon; Florian Kamp; Mark Savenije; Christina Muijs; Shafak Aluwini; Roel J. H. M. Steenbakkers; Stephanie Beuel; Martijn P. W. Intven; Johannes A. Langendijk; Stefan Both; et al. (CoRR, 2025)