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Static small-animal SPECT/CT images (maximum-intensity projections) of 177Lu-labeled rhPSMA-7.3, -7.1, and -10.1 in LNCaP tumor–bearing mice, euthanized 24 h after injection and imaged directly after blood collection, with acquisition time of 45 min on VECTor4 small-animal SPECT/PET/optimal imaging/CT device. Tumor weight and tracer uptake in tumor (%ID/g) were determined from subsequent biodistribution studies.
