PET/CT had 83% sensitivity, 54% specificity, 31% positive predictive value and 92% negative predictive value in evaluating tumor response to chemoradiotherapy in head and neck cancer patients, a study showed. "On the basis of this study, PET/CT performed six to eight weeks after the completion of intra-arterial chemoradiotherapy for advanced squamous cell carcinoma of the head and neck is a valuable tool for measuring treatment response and facilitating clinical decision making," the researchers said.

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