甲状腺微小乳头状癌高b值扩散加权成像的诊断价值
发布时间：2018-05-24 06:38
本文选题：甲状腺微小乳头状癌 + 磁共振扩散成像 ； 参考：《临床放射学杂志》2017年08期
【摘要】：目的探讨高b值扩散加权成像(DWI)诊断甲状腺微小乳头状癌的价值。方法选择因甲状腺结节拟行手术患者75例,术前均常规进行甲状腺DWI检查,分别测量不同b值DWI图像中单个结节与邻近正常甲状腺组织信号强度的比值(R值:R0、R800、R2000)以及高b值DWI图像中R值较低b值DWI图像中R值变化情况(Type-R800/0、Type-R2000/0、Type-R2000/800:Ⅰ型为上升型、Ⅱ型为平台型、Ⅲ型为下降型),再通过与术后病理检查结果对照,评估上述诊断指标对甲状腺微小乳头状癌与良性结节的鉴别诊断价值。结果共有良性结节53个和微小乳头状癌42个纳入结节测量和统计分析。(1)单变量分析结果显示,R值中的R0和R2000,以及R值变化类型中的Type-R800/0、Type-R2000/0、Type-R2000/800,在甲状腺微小乳头状癌与良性结节间显著(P㩳0.05)。(2)多变量分析结果显示,R0(敏感度和特异性分别为83.26%和64.78%)以及Type-R2000/0(敏感度和特异性分别为93.81%和85.63%),可作为甲状腺微小乳头状癌的独立诊断指标(P值分别㩳0.05和㩳0.001);如果将R0和Type-R2000/0联合诊断,特异性可进一步提高(87.59%)。结论高b值DWI对于甲状腺微小乳头状癌与良性结节鉴别诊断价值较高。
[Abstract]:Objective to evaluate the value of high b value diffusion weighted imaging (DWI) in the diagnosis of thyroid micropapillary carcinoma. Methods Seventy-five patients with thyroid nodules who were scheduled for operation were examined with DWI before operation. The ratio of signal intensity of single nodule to adjacent normal thyroid tissue in DWI images with different b values was measured. The ratio of signal intensity of single nodule to adjacent normal thyroid tissue was R: R0 / R800 R2000) and the R value of high b value DWI images was lower than that of DWI images with lower b value. The changes of R values in high b value DWI images were as follows: Type-R800 / 0 Type-R2000 / 0 / 0 Type-R2000 / 800: type I was ascending type, type 鈪，
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