"Patients underwent PET imaging with 18F-FDG at the start of their chemotherapy regimen. This exam was repeated after their second cycle of chemotherapy to gauge how metabolically active the tumors were. This information was then used to gauge the patients’ predicted therapy response and prognosis..."
http://www.diagnosticimaging.com/pet-ct/content/article/113619/2029093
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http://www.diagnosticimaging.com/pet-ct/content/article/113619/2029093
(Click link for full story)