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Published on: June 7, 2015
Design and Fabrication of MR-Tracked Metallic Stylet for Gynecologic Brachytherapy
Yue Chen1, Wei Wang2, Ehud J Schmidt3
1College of Engineering, The University of Georgia, Athens, GA, 30605 USA, and is also with Department of Mechanical Engineering, The University of Hong Kong, HK, China (ychen@uga.edu, ychen14@hku.hk).
Abstract:
Active magnetic resonance (MR) tracking for gynecologic brachytherapy was made possible by attaching the micro radiofrequency coils to the brachytherapy applicator. The rectangular planar micro coil was fabricated using flexible printed circuits with dimensions of 8mm×1.5mm. A 5-Fr (1.6mm) tungsten brachytherapy stylet was custom-machined to incorporate the micro coils. The finite element analysis and the phantom tissue studies show that the proposed device enables in situ, real-time guidance of access routes to the target anatomy safely and accurately. The setup was tested in a Siemens 3T MR scanner. The micro coils can be localized rapidly (up to 40 Hz) and precisely (resolution: 0.6×0.6×0.6mm3) using an MR-tracking sequence.
