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Table 1 Treatment response according to lesion size, contrast enhancement, necrosis, and combined criteria

From: Image-based response assessment of liver metastases following stereotactic body radiotherapy with respiratory tracking

Treatment response

Lesion size

Contrast Enhancement

Necrosis

Combined criteria

Complete response

Disappearance of lesion

-

Total necrosis

Disappearance of lesion OR Total necrosis

Partial response

≥ 30% decrease

-

-

≥ 30% decrease

Stable disease

< 30% decrease or <20% increase

-

-

Neither complete, nor partial nor progressive lesion

Progressive disease

≥ 20% increase

Lobulated thick enhancement

-

≥ 20% increase OR Lobulated thick enhancement