Figure 3

Observation of blood flow in tumors by color Doppler flow imaging (CDFI). A: more than five dot-like blood flow signals and three club-like blood flow signals (arrow) detected in tumors in the control group; B: dot- and club-like blood flow (arrow) in tumors in the gemcitabine group; C: a short-like blood flow (arrow) in tumors in the ginsenoside Rg3 group; D: a thin- and short-like blood flow (arrow) in tumors in the combination group. E: levels of signals of blood flow. Signals of blood flow in tumors of CDFI were classified into four grades: 0, no blood flow signals detected within the tumor; I, minimal blood flow (one or two dot-like or a thin- and short-like blood flow signals detected within the tumor); II, moderate blood flow (up to three dot-like blood flow signals or one longer blood flow signals detected within the tumor); and III, abundant blood flow (more than five dot-like blood flow signals or two longer blood flow signals detected within the tumor).