Will Karl, Krug Johannes, Jungnickel Kerstin, Fischbach Frank, Ricke Jens, Rose Georg, Omar Abbas
Department of Signal Processing and Communications, Otto-von-Guericke-University of Magdeburg, Universitaetsplatz 2, 39106, Germany.
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:1601-4. doi: 10.1109/IEMBS.2010.5626664.
RF ablation (RFA) is used for thermal ablation of tumors in which the RF electrode is placed in the tissue under image-guidance. Because of the good tumor visibility and the lack of ionizing radiation, MR-guided RFA is the method of choice. Additionally, with the help of MR thermometry the RF ablation can be monitored during the intervention. Unfortunately, the imaging of an MR scanner is highly sensitive to interferences caused by external electrical signals. In this paper the high-power RF ablation signal of a commercially available medical therapy device is made MR-compatible. A design of a low-pass filter with high-power compatibility is presented. The filter performance is demonstrated by means of simulations and measurements.
射频消融（RFA）用于肿瘤的热消融，其中射频电极在图像引导下置于组织中。由于肿瘤可视性良好且无电离辐射，磁共振引导下的射频消融是首选方法。此外，借助磁共振热成像技术，可在干预过程中监测射频消融。不幸的是，磁共振扫描仪的成像对外部电信号引起的干扰高度敏感。本文使市售医疗治疗设备的高功率射频消融信号与磁共振兼容。提出了一种具有高功率兼容性的低通滤波器设计。通过仿真和测量展示了滤波器性能。
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