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目的 我们对头颈部恶性肿瘤患者的颈部同时用 MRI和 CT进行检查 ,了解颈部肿瘤转移淋巴结在两图像中的表现 ,总结出 MRI和 CT在诊断颈部转移淋巴结中的特征。方法 6 2例头颈部恶性肿瘤患者 ,术前行MRI扫描 ,其中 9例同时又做 CT扫描 ,其结果用双盲法与术后颈部淋巴结的病理对照。结果 MRI和 CT均有较高的诊断价值 ,其图像的特征 :1CT诊断转移的淋巴结 ,主要根据其直径大小和形态的变化。MRI在发现淋巴结形态变化的基础上 ,能结合淋巴结内信号的变化 ,可提供更多的诊断信息 ;2 MRI在判断淋巴结的同时 ,能清楚地发现周围血管等重要器官的情况 ;3MRI不用造影剂就能识别异常的淋巴结 ,CT则用造影剂增强 ,才能达到目的 ;4MRI类扫描时间比 CT长。结论 MRI和 CT为目前临床上判断颈淋巴结转移的有效方法 ,其中 MRI更简捷、更直观
Objective We examined the neck of patients with head and neck malignant tumors by both MRI and CT to understand the performance of cervical lymph node metastasis in both images and summarized the features of MRI and CT in the diagnosis of cervical lymph node metastasis. Methods Twenty-two patients with malignant head and neck cancer underwent MRI scan before operation. Nine of them underwent CT scan at the same time. The results of double-blind and postoperative neck lymph node pathology were compared. Results Both MRI and CT have high diagnostic value. The features of the image are: 1CT diagnosis of lymph node metastasis, mainly based on its diameter and shape changes. Based on the morphological changes of lymph nodes, MRI can provide more diagnostic information by combining with the change of signal in lymph nodes. 2 MRI can clearly find the peripheral organs such as peripheral blood vessels while judging the lymph nodes. 3MRI does not use contrast media Can identify abnormal lymph nodes, CT is enhanced with contrast agents, in order to achieve the goal; 4MRI class scan time longer than CT. Conclusion MRI and CT are the effective methods to judge the metastasis of cervical lymph nodes in clinical practice, in which MRI is more simple and more intuitive