全身磁共振扩散加权成像在淋巴结病变的应用

目的探讨全身磁共振扩散加权成像(whole body maganetic resonance diffusion weighted imaging,WBMRIDWI)对淋巴结病变的诊断价值。方法经病理或临床证实的淋巴结病变患者21例,其中肿瘤性病变12例(淋巴瘤5例,肺癌7例),系统性红斑狼疮9例,所有患者均接受WBMRIDWI检查,原始图像经后处理获得3DMIP图像并翻转显示。分别计数淋巴结病变个数,测量ADC值。结果 WBMRIDWI清楚显示淋巴结病变,良性和恶性淋巴结病变均呈高信号。淋巴瘤的平均ADC值明显小于良性组,两者间差异有统计学意义(P0.05)。肺癌原发灶与转移灶的ADC值之间差异无统计学意义(P0.05)。结论 WBMRIDWI对淋巴结的显示较敏感,可作为探测全身良、恶性淋巴结病变的一种快速可行方法。

Diagnosis of lymphonodus lesion: Application of whole body MRI diffusion weighted imaging

Objective To investigate the diagnostic value of lymph node lesion by whole body maganetic resonance diffusion weighted imaging（WB MRI DWI）.Methods 21 patients with lymph node lesion confirmed by pathology or clinic performed WB MRI DWI.In the group,12 patients with tumors（lymphoma=5 cases,lung cancers =7 cases）and 9 SLE（systemic lupus erythematosus,SLE） patients were included.Original data was reconstructed in 3D MIP images and inverted display.The lymphadenopathy was counted and the ADC values were measured.Results The lymph node lesions were displayed clearly on the WB MRI DWI.All benign and malignant abnormal lymph nodes showed high signal intensity.The ADC values of lymphoma were lower than the benign lymph node lesions with statistical difference（P0.05）.There was no statistical difference between the ADC values of lung cancer and metastatic lesions（P0.05）.Conclusion It is a feasible method to detect the lymph node lesions by the WB MRI DWI.