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Design and Fabrication of MR-Tracked Metallic Stylet for Gynecologic Brachytherapy

机译:MR跟踪金属通心针在妇科近距离治疗中的设计与制作

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摘要

Active magnetic resonance (MR) tracking for gynecologic brachytherapy was made possible by attaching the microradiofrequency coils to the brachytherapy applicator. The rectangular planar microcoil was fabricated using flexible printed circuits with dimensions of 8 mm × 1.5 mm. A 5-Fr (1.6 mm) tungsten brachytherapy stylet was custom-machined to incorporate the microcoils. The finite element analysis and the phantom tissue studies show that the proposed device enables real-time guidance of access routes to the target anatomy safely and accurately. The setup was tested in a Siemens 3T MR scanner. The microcoils can be localized rapidly (up to 40 Hz) and precisely (resolution: 0.6 mm × 0.6 mm × 0.6 mm) using an MR-tracking sequence.
机译:通过将微射频线圈连接到近距离放射治疗器上,可以进行妇科近距离放射治疗的主动磁共振(MR)跟踪。使用尺寸为8 mm×1.5 mm的柔性印刷电路制造矩形平面微线圈。定制加工了5-Fr(1.6 mm)钨丝近距离放射探针,以结合微线圈。有限元分析和幻像组织研究表明,所提出的设备能够安全,准确地实时引导通往目标解剖结构的通路。该设置已在Siemens 3T MR扫描仪中进行了测试。使用MR跟踪序列,可以快速定位微线圈(最高40 Hz)并精确定位(分辨率:0.6 mm×0.6 mm×0.6 mm)。

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