1D Cs2AgBr3:Mn2+ crystals to Realize High Resolution X-ray Scintillation Imaging Lead halide perovskites have been intensively explored as scintillators due to their cost-effective fabrication and high radioluminescence. The intrinsic unstable characteristics and nocuous Pb elements in CsPbX3-related scintillators pose serious challenges to their commercial applications. Herein, lead-free and highly radioluminescent Cs2AgBr3:Mn2+ scintillators were reported for high-resolution X-ray imaging.