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EJNMMI Research
Fig. 4 | EJNMMI Research

Fig. 4

From: Prognostic value of simultaneous 18F-FDG PET/MRI using a combination of metabolo-volumetric parameters and apparent diffusion coefficient in treated head and neck cancer

Fig. 4

Case of tonsillar cancer with no evidence of disease predicted by combined PET/MRI parameters but treatment failure predicted by PET parameters. A 66-year-old male underwent preoperative simultaneous 18F-FDG PET/MRI due to a 3.8-cm-sized left tonsillar cancer. a Fusion image of regional PET with ADC map and b regional PET images showed left tonsillar mass with hypermetabolism (arrows). c ADC map image demonstrated left tonsillar mass with diffusion restriction (arrow). d Gadolinium-enhanced T1 axial image revealed mass with peripheral enhancement (arrow). ADCmean (1443.85), (SUVmax/ADCmean) × 1000 (10.37), (MTV/ADCmean) × 1000 (10.69), and (TLG/ADCmean) × 1000 (57.53) predicted no evidence of disease; however, SUVmax (14.97), MTV (15.44), and TLG (83.07) predicted treatment failure. The patient showed no evidence of disease until 41 months follow-up after tonsillar cancer surgery

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