Multimodality functional imaging using DW-MRI and 18F-FDG-PET/CT during radiation therapy for human papillomavirus negative head and neck squamous cell carcinoma: Meixoeiro Hospital of Vigo Experience

Figure 3 Representative no evidence of disease patient. A and G: Pre-Tx PET/CT of the primary tumor and a neck nodal metastasis; B and H: Primary tumor and representative neck nodal metastasis contoured over a T2-W MRI; C and I: Pre-Tx ADC map overlaid on T2-W MRI; D and J: Wk2-Tx ADC map overlaid on T2-W; E and K: Wk3-Tx ADC map overlaid on T2-W; F and L: T2-W MRI post-Tx with no evidence of primary tumor and neck nodal metastases. PET/CT: Positron emission tomography/computed tomography; MRI: Magnetic resonance imaging; ADC: Apparent diffusion coefficient; IMRT: Intensity modulated radiation therapy.