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FCH PET/CT of a patient with metastatic hormone‐refractory prostate cancer. Prior to chemotherapy, the FCH PET/CT image ( A ) demonstrates seven metabolically active skeletal metastases involving multiple thoracic and lumbar vertebrae (arrows). Posttreatment FCH PET/CT performed following three cycles of chemotherapy ( B ) demonstrates persistently increased activity in only four of the seven metastases identified on the pretreatment scan (arrows).
