鼻咽黏膜DWI影像特点对于鼻咽良恶性病变判断的价值

目的：探讨DWI图像上鼻咽黏膜的影像特点对于判断鼻咽良恶性病变的价值。方法：对112例DWI图像的鼻咽黏膜影像进行分析，分别按照影像特点（对称性、信号强度、黏膜厚度）进行分组，依次分为对称组和不对称组、高信号组和低信号组、增厚组和不厚组。将分组结果与定性结果进行对比分析，探讨这3个影像特点对于判断鼻咽良恶性病变的价值。结果：对称组和不对称组、高信号组和低信号组、增厚组和不厚组之间均存在显著性差异。对称性的灵敏度和特异度分别为79．5％、65．8％，信号强度为59．0％、95．9％，黏膜厚度为74．4％、94．5％，它们的Az值分别为0．726、0．774、0．844。结论：对称性、信号强度、黏膜厚度可以作为DWI图像上鼻咽良恶性病变的判断标准之一，其中黏膜厚度的诊断价值最大。

The value of DWI in differential diagnosing benign and malignant nasopharyngeal lesions

Objective： Study on the DWI imaging features of nasopharyngeal mueosa to differentiate nasopharyngeal benign or malignant lesions. Methods： 112 cases with DWI of nasopharyngeal mucosa were divided into 6 groups according to the imaging features （symmetry, signal intensity of bilateral fractures, thickness of mucosa）, symmetric and asymmetric group, high signal and low signal group, mucosal thickening group and non-thickening group. Grouping and qualitative results were compared and analyzed. To study the value of the features of the 3 groups to judge the nature of nasopharyngeal lesions. Restilts： There were significant differences between symmetric group and asymmetric group, high signal group and low signal group, thickening group and non-thickening group. The sensitivity and specificity of symmetry were 79.5%, 65.8%, signal intensity were 59%, 95.9%, the thickness of mucosa were 74.4%, 94.5%, and their Az values were 0.726, 0.774, 0.844. Con- clusion： Symmetry, signal intensity and thickness of mucosa can be used as diagnostic criteria of nasopharyngeal benign or malignant lesions on the DWI image, and diagnostic value of mucosal thickness is the largest.