Molecular Imaging and Gene Therapy*

Whole-body autoradiograms (coronal section) obtained at 2 h (A) and 24 h (B) after intravenous injection of ¹¹¹In-DTPA-PEI; 13762 cells (10⁶) were implanted subcutaneously in thigh approximately 2 wk before imaging study. Lu = lung; T = tumor; K = kidney; Li = liver; I = intestine; Sp = spleen; S = stomach; C = colon.