Use-fullness of dynamic contrast-enhanced MR imaging and diffusion weighted MR imaging for differentiation of benign and malignant parotid tumors

SM journal of clinical and medical imaging Pub Date : 2018-05-28 DOI:10.36879/jcmi.18.000101

S. Zheng, Zf Xu, Xh Wu, A. Pan

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引用次数: 2

Abstract

Objectives: To evaluate the usefullness of dynamic contrast-enhanced MR Imaging (DCE-MRI) and diffusion weighted imaging (DWI) for differentiating benign from malignant parotid tumors. Methods: Prospectively,DCE-MRI and DWI were performed in 112 patients, with 148 confirmed parotid masses. The differential optimal thresholds were determined. Results: WConsidering tumors with time-intensity curve (TIC) Type C as malignant, sensitivity, specificity, accuracy were 95%, 76%, 79%, respectively. Considering ADC threshold values 0.709×10-3mm2 /s0.315 between Warthin and malignant tumors, threshold Kep>0.555 min-1 and Ve <0.605 between pleomorphic adenomas and malignant tumors, sensitivity, specificity, accuracy for malignancy were 70% vs 90%, 96% vs 74%, 92% vs 80%, respectively. Conclusion: DCE-MRI and DWI provide more information in differentiating benign from malignant parotid tumors.

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动态增强磁共振和扩散加权磁共振在腮腺良恶性肿瘤鉴别中的应用

目的:探讨动态增强磁共振成像(DCE-MRI)和扩散加权成像(DWI)对腮腺良恶性肿瘤鉴别的价值。方法:前瞻性对112例患者行DCE-MRI及DWI检查，其中确诊腮腺肿物148例。确定了差分最优阈值。结果:时间强度曲线(TIC) C型肿瘤为恶性，敏感性为95%，特异性为76%，准确性为79%。考虑到沃氏腺瘤与恶性肿瘤的ADC阈值0.709×10-3mm2/s0.315，多形性腺瘤与恶性肿瘤的阈值keep >0.555 min-1和Ve<0.605，对恶性肿瘤的敏感性、特异性和准确性分别为70%对90%、96%对74%、92%对80%。结论:DCE-MRI和DWI对腮腺良恶性肿瘤的鉴别提供了更多的信息。

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SM journal of clinical and medical imaging

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