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Fig 1. Standard ROI placement. Co-registration of PET and MR imaging was attempted in all cases. The tumor maximal SUV was selected as the highest accumulation in the entire tumor. Also, the mean SUV of the contralateral normal frontal cortex was drawn in 3 circular ROIs with a diameter of 10 mm on each of the 3 axial planes. Left: MET PET. Right: FLAIR image.
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