SUPERCONDUCTING OPEN-CONFIGURATION MR-IMAGING SYSTEM FOR IMAGE-GUIDED THERAPY
SUPERCONDUCTING OPEN-CONFIGURATION MR-IMAGING SYSTEM FOR IMAGE-GUIDED THERAPY
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DOI：
10.1148/radiology.195.3.7754014
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发表时间：
1995-06-01
期刊：
影响因子：
19.7
通讯作者：
VOSBURGH, KG
中科院分区：
文献类型：
--
作者：
SCHENCK, JF;JOLESZ, FA;VOSBURGH, KG
目的：开发一种超导磁共振（MR）成像仪，该成像仪可直接进入患者，并允许交互式磁共振引导介入手术。材料和方法：设计并制造了一个0.5 t超导磁体，该磁体允许患者垂直进入一个区域。该磁体集成了新设计的屏蔽梯度线圈、柔性表面线圈和非磁性显示器，以及位置监测探头和设备跟踪仪器。结果：磁体均匀性为12.3 ppm，梯度场在直径30 cm的成像区域内线性范围在1%以内。信噪比比同类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获得图像。交互式图像平面选择和近实时成像，使用快速梯度召回回波序列，以每1.5秒一张图像的速率进行了演示。结论：磁共振引导下的介入手术可以在患者充分接触的情况下进行，使用开放式超导磁共振磁体，具有近实时成像和交互式图像平面控制。
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.