Text this: 3D-FSE-XETA-T1WI平扫序列在评估MCA狭窄中的诊断价值：VWI多序列与DSA的对照研究(The Diagnostic Value of 3D-FSE-XETA-T1WI Plain Scan Sequence in Evaluating MCA Stenosis: A Control Study of VWI Multi-Sequence and DSA)