Reply to Anwar R. Padhani, Frederic LeCouvet, Giuseppe Petralia, and Dow-Mu Koh's Letter to the Editor re: Alonso Garcia-Ruiz, Carlos Macarro, Francesca Zacchi, et al. Whole-body Magnetic Resonance Imaging as a Treatment Response Biomarker in Castration resistant Prostate Cancer with Bone Metastases: The iPROMET Clinical Trial. Eur Urol. In press. https://doi.org/10.1016/j.eururo.2024.02.016.