MR-TRICKS技术在足踝软组织病变诊断中的应用

摘要

Objective: To study the feasibility and clinical value of three-dimensional (3D) time resolved imaging of contrast kinetics (TRICKS) using a 1. 5T MR equipment in the diagnosis of soft tissue diseases of the ankle and foot. Methods:The clinical and imaging materials of 31 cases with suspected or known soft tissue diseases of the ankle and foot were retrospectively analyzed by two senior radiologists. Conventional MR sequences and TRICKS were performed and MIP reconstruction was done to evaluate the image quality of vasculature and the relationship of the arteries and soft tissue diseases of ankle or foot. The dynamic changes of blood flow and staining of lesions in ankle and foot were observed. Time-signal curve of local lesion on TRICKS images after subtraction were calculated using the SER software, and the peak value of time-signal curve was obtained. Results: Of the 31 cases, there were 28 cases (28/31) gaining a high arterial scale (≥3 points) ,and the arterial branches of the ankle and foot could be clearly assessed on TRICKS images. The relationship of the supplying arteries and soft tissue lesions (23 cases) and tumor staining (5 cases) could also be obtained on TRICKS images. The dynamic kinetics and degree of enhancement of soft tissue lesions could be reflected on time-signal curve. Conclusion: TRICKS was feasible and valuable in the diagnosis of soft tissue diseases of the ankle and foot, which provided important reference for clinical treatment of soft tissue diseases of ankle and foot.%目的:探讨1.5T MR-TRICKS技术在足踝血管成像的可行性及在足踝疾病诊断中的临床应用价值.方法:回顾性分析进行MR常规序列及TRICKS序列扫描的31例疑似或确诊的足踝部病变患者的临床及影像学资料.两位有经验的放射科医生利用MIP重建图像来评价足踝血管成像质量,评价动脉与足踝部病变的关系,并观察足踝部动脉动态血流及病变染色情况.TRICKS减影后图像使用功能软件SER计算出相应病变的时间信号曲线,得出时间信号曲线的峰值.结果:31例中有28例血管成像质量得分≥3,TRICKS影像能清晰显示足踝部动脉及分支;8例经临床及影像学证实无足踝部病变;TRICKS影像可显示足踝动脉与病变的关系(23例)及肿瘤染色(5例);时间信号曲线反映了软组织病变的动态强化程度.结论:TRICKS技术在足踝软组织病变的诊断中是可行性的,它为临床诊断提供更多有价值的信息,并为临床治疗提供参考.