发明名称 System and method for magnetic-resonance-guided electrophysiologic and ablation procedures
摘要 A system and method for using magnetic resonance imaging to increase the accuracy of electrophysiologic procedures includes an invasive combined electrophysiology and imaging antenna catheter which includes an RF antenna for receiving magnetic resonance signals and diagnostic electrodes for receiving electrical potentials. The combined electrophysiology and imaging antenna catheter is used in combination with a magnetic resonance imaging scanner to guide and provide visualization during electrophysiologic diagnostic or therapeutic procedures, such as ablation of cardiac arrhythmias. The combined electrophysiology and imaging antenna catheter may further include an ablation tip, and be used as an intracardiac device to deliver energy to selected areas of tissue and visualize the resulting ablation lesions. The antenna utilized in the combined electrophysiology and imaging catheter for receiving MR signals is preferably of the coaxial or "loopless" type. High-resolution images from the antenna may be combined with low-resolution images from surface coils of the MR scanner to produce a composite image. A system for eliminating the pickup of RF energy in which intracardiac wires are detuned by filtering so that they become very inefficient antennas. An RF filtering system is provided for suppressing the MR imaging signal while not attenuating the RF ablative current. Steering means may be provided for steering the invasive catheter under MR guidance. Other ablative methods can be used such as laser, ultrasound, and low temperatures.
申请公布号 US2006100506(A1) 申请公布日期 2006.05.11
申请号 US20050314241 申请日期 2005.12.22
申请人 JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE 发明人 HALPERIN HENRY R.;BERGER RONALD D.;ATALAR ERGIN;MCVEIGH ELLIOT R.;LARDO ALBERT;CALKINS HUGH;LIMA JOAO
分类号 A61B5/05;A61B5/055;A61B17/00;A61B19/00;G01R33/28 主分类号 A61B5/05
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