三维快速稳态进动成像序列诊断颅内良性脊索细胞瘤

Three-dimentional fast imaging employing steady-state acquisition in diagnosis of ecchordosis physaliphora

目的 探讨三维快速稳态进动成像（3D-FIESTA）序列诊断颅内脊索细胞瘤（EP）的价值。方法 收集接受后颅窝MR扫描的760例临床疑似颅底神经病变患者的临床及影像学资料,包括FSE T2W、3D-T1W及3D-FIESTA序列平扫和3D-T1W序列增强扫描图像。分析EP患者影像学征象,评价不同序列对EP病灶的显示效果。结果 共发现EP患者12例（12/760,1.58%）,病灶均位于斜坡硬膜下桥前池,其中8例患者接受增强扫描,所有病灶均未见强化。9例（9/12,75.00%）无症状者病灶最大径2.0~11.0mm,9例（9/12,75.00%）可见斜坡背侧“骨突”。12例（12/12,100%）EP病灶均可于3D-FIESTA图像上清晰显示,呈稍高或高信号。8例（8/12,66.67%）病灶可于FSE T2WI图像呈高信号,显示欠清晰,余病灶不能与脑脊液区分。4例（4/12,33.33%）病灶于3D-T1WI图像呈低信号,显示欠清晰,余8例（8/12,66.67%）不能显示。结论 3D-FIESTA序列诊断EP优于常规MR序列,具有较高的临床应用价值。

Objective To explore the value of three-dimentional fast imaging employing steady-state acquisition （3D-FI- ESTA） in diagnosis of ecchordosis physaliphora （EP）. Methods The clinical and imaging datum of 760 patients underwent MR scan because of suspected cranial nerve lesion were collected. The plain scan image included FSE T2W, 3D-T1W, 313- FIESTA sequence, and enhancement scan image was 3D-T1W sequence. Imaging features of EP were analyzed, and display effect of different sequences on EP lesions was evaluated. Results Totally 12 EP patients （12/760, 1.58%） were discov- ered. All the lesions were located intradurally in prepontine cistern of the clivus, in which 8 cases underwent enhancement scan, who were all without enhancement. Maxmum diameter in 9 cases （9/12, 75.00%） who had no symptoms was from 2.0 mm to 11.0 ram. Apophysis was found in 9 cases （9/12, 75.00%）. Twelve cases （12/12, 100%） were all displayed clearly in 3D-FIESTA image, and showed slightly hyperintensity or hyperintensity. Eight cases （8/12, 66.67 %） were displayed in FSE T2WI less clearly, and showed hyperintensity, the other 4 cases （4/12, 33.33%） could not differentiate with cerebrospinal fluid. Four eases （4/12, 33.33%） were displayed in 3D-TIWI less clearly, and showed hypointensity, the other 8 cases （8/12,66.67%） could not be displayed. Conclusion 3D-FIESTA in diagnosis of on EP is superior to the conventional MR sequences, which has higher clinical application value.