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Fig. 1 | Radiation Oncology

Fig. 1

From: Relapse patterns after radiochemotherapy of glioblastoma with FET PET-guided boost irradiation and simulation to optimize radiation target volume

Fig. 1

Residual tumor volumes in FET-PET and MRI after glioblastoma resection left frontal are shown in the upper row (a, b) and of the recurrent tumor in the lower row (c, d). The tumor volume with increased FET uptake is surrounded by a dotted line in FET-PET (a, c) and by a green line in contrast-enhanced MRI (b, d). Note the discrepancy between FET uptake and contrast enhancement both in the baseline scan (b) and at the time of relapse (d). The definition of PTV2, which is based on MRI, is indicated by the red line (b, d). The blue line demonstrated a simulated PTV based on a CTV consisting of FET-1 plus 7 mm margin

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