The Diagnostic Value of Cervical Lymph Node Metastasis in Head and Neck Squamous Carcinoma by Using Diffusion-Weighted Magnetic Resonance Imaging and Computed Tomography Perfusion
(a) (A-B) Patient with floor of mouth cancer. (A) On contrast-enhanced CT, an intensely enhancing mass is visible in the left base of tongue and left cervical area, with involvement of the sternocleidomastoid. (B) The lesions have high blood flow (BF) values. The mean BF value of the lymph node (LN) is 113.45 mL/100 g/min, (C-D) lymphadenitis with laryngeal carcinoma, (C) enhanced CT showing a nodule in the left cervical area with heterogeneous enhancement. (D) Marginal BF of 86.95 mL/100 g/min. (b) Receiver operating characteristic (ROC) curve for diffusion-weighted imaging (DWI) and CT perfusion (CTP). Areas under the curves (AUCs) are 0.830 and 0.605, respectively. There is a significant difference between the AUC of DWI and the AUC of CTP (, ).