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Treatment non-response group.
Gd-T1WI and DWI in a 77-year-old man with brain metastasis from renal cell carcinoma. The lesion volume was 2.6 cm3 at baseline, 2.9 cm3 and 3.5 cm3 at six months after radiotherapy. The ADC values in tumor parenchyma were 0.71 × 10−3 mm2/s before radiotherapy, 0.74 × 10−3 mm2/s at one month and 0.69 × 10−3 mm2/s at six months after radiotherapy.
