DLL4 and neoplasm: Figure 1A displays representative images of three-dimensional power Doppler data at 24 hours after treatment for the control (1), Dll4 mAb (3), USMB+XRT (5) and USMB+XRT+Dll4 mAb (6) treatment conditions. A decrease in flow signal was apparent in tumours treated with the triple combination (6). Quantified power Doppler results at 24 hours and 7 days after treatment are presented for all treatment conditions in figure 1B and 1C.