Science Magazine | AAAS: Science Advances Follow In vivo membrane engineering traps Gd-based MRI contrast agents for detecting microhepatocellular carcinoma | Science Advances In vivo self-assembling peptides engineer tumor membranes to trap Gd contrast agents for sensitive MRI of micro-HCC. https://www.science.org/doi/10.1126/sciadv.aec9913 science.org