Figure 4From: Accuracy of methionine-PET in predicting the efficacy of heavy-particle therapy on primary adenoid cystic carcinomas of the head and neckThe correlation between the residual ratio of the TNR and the TNR prior to CIRT. There was a significant negative correlation observed between the residual ratio of the TNR changes and the TNR prior to treatment (Spearman rank correlation coefficient, ρ = −0.32, p < 0.02).Back to article page