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Lu’s Criteria [12]
| Grade | Imaging features |
|---|---|
| 0 | No contiguity of tumor to vessel. |
| 1 | Tumor contiguous to less than one-quarter circumference. |
| 2 | Between one-quarter and one-half circumference. |
| 3 | Between one-half and three-quarters circumference. |
| 4 | Greater than three-quarters circumferential involvement or any vessel constriction. |
