Table 1 The definition of Blood flow grade and Vascular architecture classification
Blood flow grade | ||
Grade | definition | description |
I | small amount of blood flow | 1 to 2 point or fine rod-shaped vessels in the lesion |
II | medium blood flow | 3 ~ 4 punctate vessels or 1 important vessel, the length of which can be close to or beyond the radius of the lesion |
III | rich blood flow | more than 5 punctate vessels or 2 long vessels |
Vascular architecture classification | ||
Type | definition | description |
I | no blood flow | no blood flow signal was detected in the tumor |
II | stellate blood flow | the blood flow signal inside the tumor is rare, showing stellate distribution |
III | low blood flow | with small blood vessel implantation in the tumor, but rarely with blood flow signal beyond the center of the renal tumor |
IV | universal blood flow | there is circumferential blood flow around the tumor and a little blood implantation can be seen inside |
V | multi-blood flow | there are blood vessels around the tumor, and multiple or intermittent and relatively thick blood flow signals can be seen inside |