骶髂关节磁共振成像技术研究

目的：探讨骶髂关节磁共振扫描成像技术。方法：33例患者MR扫描序列包括：横轴位FSET2WI、SET1M，冠状住FSET2WI及2个冠状位FSPGR in phase。结果：7例检查者骶髂关节正常，各扫描序列均能直接显示正常骶髂关节软骨。其余26例全为AS患者，52个关节中42个骶髂关节可见软骨异常，表现为T1WI和T2WI上正常线形中等信号的软骨影像消失，取而代之的是不规则增粗或扭曲样中等信号。结论：磁共振扫描参数的优化组合和选择正确的扫描方法、恰当的线圈，以及T2WI和FSPGR in phase脂肪抑制技术的应用，更有助于显示正常骶髂关节解剖结构及病变的定位和诊断。

Study on MRI of sacroiliac joint

Objective To explore MRI of sacroiliac joint.Methods MRI was applied to 33 patients on transaxial FSE T2WI and SE T1 WI,coronal FSE T2 WI and two coronal FSPGR.Results Sacroiliac joints of 7 patients were normal,and all the sequences could directly show the cartilage of normal sacroiliac joints.The other 26 patients suffered from ankylosing spondylitis(AS),and cartilage abnormality appeared in 42 sacroiliac joints from 52 joints.The irregular thickened or tortuous ones replaced the linear intermediate signals on T1WI and T2WI.Conclusion Such measures do good to MRI of normal sacroiliac joint structure and pathological changes as optimization of scanning parameters,selection of proper scanning method and coil,as well as application of T2WI and FSPGR in phase fat suppression technology.