去金属伪影序列在脊柱金属植入物患者MR成像中的应用

Clinical application of syngo WARP in the metallic prostheses MR imaging

目的 探讨去金属伪影（syngo WARP）序列在金属植入物患者脊柱MRI中的应用价值.方法 收集25例脊柱（颈、腰椎）金属植入物患者,均行脊柱MR常规序列及syngo WARP优化序列扫描,分析2种序列检查的扫描时间及图像质量评分,并采用配对t检验进行比较.结果 所有患者均顺利完成检查.颈椎常规序列检查时间为8 min 16 s,syngo WARP优化序列检查时间为12 min 45 s,差异有统计学意义（t=7.963,P＜0.01）;腰椎常规序列和syngo WARP优化序列的检查时间分别为9 min 16 s和11 min 53 s,差异有统计学意义（t=4.904,P＜0.01）.syngo WARP优化序列图像质量评分为（4.22±0.67）分,高于常规序列的（3.56±0.53）分,差异有统计学意义（t=3.364,P=0.002）.syngo WARP优化序列图像上金属植入物周边软组织信号丢失减轻,图像变形与模糊情况都较常规序列明显改善.结论 syngo WARP技术可以减轻金属植入物MR伪影,改善图像质量,在金属植入物患者脊柱MRI中具有较大的应用价值.

Objective To investigate the value of syngo WARP technology for spine MR imaging in patients with metallic prosthesis.Methods Twenty-five patients with metallic prosthesis in cervical spine or lumbar spine were prospectively included in this study.Both conventional MR sequences and optimized sequences with syngo WARP were applied in all patients.Acquisition time and image quality of two sequences were compared using a paired t test.Results All patients were examined successfully.Scanning time of cervical spine was 8 min 16 s vs.12 min 45 s for conventional sequences and syngo WARP optimized sequences respectively,with a significant difference （t =7.963,P ＜ 0.01）.Scanning time of lumbar spine was longer by syngo WARP optimized sequences compared with conventional sequences （11 min 53 s vs.9 min 16 s）,with a significant difference （t =4.904,P ＜ 0.01）.However,image quality was better for syngo WARP optimized sequences compared with conventional sequences （4.22 ± 0.67 vs.3.56 ± 0.53 ;t =3.364,P =0.002）.STIR with syngo WARP could optimize the signal loss of metallic prosthesis surrounding tissues,and significantly improve image distortion and blurring compared to the conventional sequence.Conclusion Syngo WARP technique could effectively reduce metal artifacts and better display metal implant surrounding tissue and anatomical structure with potential clinical value.