Ultrasound and x-ray imageable poloxamer-based hydrogel for loco-regional therapy delivery in the liver by Delgado, JF, Owen, JW, Pritchard, WF, Varble, NA, Lopez-Silva, TL, Mikhail, AS, Arrichiello, A, Ray, T, Morhard, R, Borde, T, Saccenti, L, Xu, S, Rivera, J, Schneider, JP, Karanian, JW, Wood, BJ