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首页> 外文期刊>Radiology >Superconducting open-configuration MR imaging system for image-guided therapy.
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Superconducting open-configuration MR imaging system for image-guided therapy.

机译：用于图像引导治疗的超导开放配置MR成像系统。

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摘要

PURPOSE: To develop a superconducting magnetic resonance (MR) imager that provides direct access to the patient and permits interactive MR-guided interventional procedures. MATERIALS AND METHODS: A 0.5-T superconducting magnet that allows a region of vertical access to the patient was designed and constructed. This magnet was integrated with newly designed shielded gradient coils, flexible surface coils, and nonmagnetic displays and with position-monitoring probes and device-tracking instrumentation. RESULTS: The magnet homogeneity was 12.3 ppm, and the gradient field was linear to within 1% over an imaging region 30 cm in diameter. The signal-to-noise ratio was 10% higher than in a comparable 0.5-T superconducting imager. Images were obtained in several anatomic regions with use of routine pulse sequences. Interactive image plane selection and near real-time imaging, with use of fast gradient-recalled echo sequences, were demonstrated at a rate of one image every 1.5 seconds. CONCLUSION: MR-guided interventional procedures can be performed with full patient access with use of an open-configuration, superconducting MR magnet with near real-time imaging and interactive image plane control.
机译：目的：开发一种超导磁共振（MR）成像仪，该成像仪可​​直接与患者接触并允许交互式的MR引导介入程序。材料与方法：设计并构造了0.5-T超导磁体，该磁体允许垂直进入患者区域。该磁体与新设计的屏蔽梯度线圈，柔性表面线圈和非磁性显示器集成在一起，并与位置监控探针和设备跟踪仪器集成在一起。结果：磁体均匀度为12.3 ppm，并且在直径为30 cm的成像区域内，梯度场呈线性变化，误差在1％以内。信噪比比类似的0.5-T超导成像仪高10％。使用常规脉冲序列在几个解剖区域中获得图像。演示了交互式图像平面选择和近实时成像（使用快速梯度称为回波序列），每1.5秒显示一张图像。结论：MR引导的介入程序可以通过使用开放配置，超导MR磁体，近实时成像和交互式图像平面控制的完全患者通道来执行。

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