论文部分内容阅读
目的 探讨磁共振去金属伪影成像序列(syngo WARP)在人工全髋关节置换术后磁共振成像的应用价值.方法 搜集17例人工髋关节术后患者(其中3例行假体翻修术),进行髋关节MR常规序列和syno WARP序列扫描(包括STIR-T2WI-WARP和T1WI-WARP序列),比较两种序列扫描金属植入物信号丢失的程度及周围组织结构的显示范围,评价图像质量,分析MRI图像上显示关节滑膜、肌肉及骨质结构改变情况.结果 syno WARP优化序列中髋臼假体结构扭曲、边缘模糊效应明显低于常规序列,STIR-T2 WI-WARP和T1WI-WARP信号丢失面积为21.07 cm2、16.59 cm2,明显小于常规STIR 43.36 cm2和T1WI 41.30 cm2;syngo WARP优化序列图像质量评分为(4.33±0.36)分,高于常规序列的(3.05±0.53)分,差异均有统计学意义(P＜0.01).syno WARP优化序列可清楚显示关节积液、骨溶解、关节囊内炎性假瘤、肌肉肌腱损伤等.结论 syngo WARP序列可以很好地降低金属植入物的磁敏感伪影,显示髋关节的解剖结构及异常改变,为髋关节术后提供一种有效的检查方法.“,”Objective To evaluate syngo WARP technology for MR imaging in patients with pain after total hip arthroplasty.Methods Seventeen patients without any symptoms and ten patients with pain after total hip arthroplasty were prospectively included in this study.Both conventional MR sequences and optimized sequences with syngo WARP were applied in all patients.Signal void and image quality of two sequences were compared using a paired t test.Results Signal void around the acetabular component was smaller for STIR-WARP than STIR-T2 WI (21.07 cm2 vs 43.36 cm2,P ＜ 0.01),and for T1-WARP than T1WI images(16.59 cm2 vs 41.30,P ＜0.01).Image quality was better for syngo WARP optimized sequences compared weith conventional sequences(4.33 ± 0.36 vs 3.05 ±0.53,P ＜ 0.01).Abnormal MR imaging findinds included fluid,osteolysis,pseudotumor,muscle edema and tendon injury.Conclusion STIR-WARP and T1-WARP sequences could effectively reduce metal artifacts and better display metal implant surrounding tissue and anatomical structure for clinical use.