1．5T磁共振全身弥散加权成像对肺癌骨转移的应用

目的：探讨背景抑制快速全身磁共振弥散成像（WB-DWI）技术在肺癌骨转移中的初步应用价值。方法：对40例健康志愿者和56例经病理证实为肺癌的患者进行WB-DWI检查，经三维-最大密度投影（3D-MIP）重建和黑白翻转后处理，将骨骼系统分为8个区域，分别记录每个患者各区域WB-DWI阳性病例数。对所有WB—DWI影像与同位素骨扫描（SPECT）影像表现比较分析。结果：WB-DWI阳性病例为42例，受累区域85处，共检出病灶数为207处；SPECT阳性病例为39例，受累区域81处，共检出病灶数为199处。结论：WB-DWI与SPECT有非常好的一致性，且WBCDWI检查廉价快捷无辐射，重复性好，在肺癌骨转移检出和治疗后随访方面具有重要的临床应用价值。

Applicaton of 1.5T MR whole body diffusion weighted imaging of bone metastasis of lung cancer

Objective：To evaluate the value of whole body diffusion weighted imaging with background suppression（WB-DWI） in the detection of bone metastasis of lung cancer. Methods： 40 healthy volunteers and 56 patients with lung cancer validated by pathology were enrolled in our study. All the patients received MR examination with technology of WB-DWI, and all the images were reconstructed with 3 dlmensional-maximum intensity projection （3D-MIP） and were reversed from black to white. The skeltal system was divided into eight regions and the number of positive was recorded patient by patient and region by region. The images of WB-DW/were compared with those of signal proton emission computed tomgraphy （SPECT）. Results：A total 207 metastatic lesions in 85 regions of 42 patients were detected by WB-DWI while 199 lesions in 81 regions of 39 patients were indentified by SPECT. Conclusion：The WBDWI reveals excellent consistency with SPECT detecting bone metastasis, and WB-DWI is eenomical and no radialization in detcefing bone metastasis of lung cancer and eomparlng the curative effect.