Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2006-12-26
2006-12-26
Mercader, Eleni Mantis (Department: 3737)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
C324S307000, C324S309000, C324S318000, C600S421000
Reexamination Certificate
active
07155271
ABSTRACT:
A system and method for using magnetic resonance imaging to increase the accuracy of electrophysiologic procedures is disclosed. The system in its preferred embodiment provides 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. The invention is particularly applicable to catheter ablation, e.g., ablation of atrial fibrillation. In embodiments which are useful for catheter ablation, the combined electrophysiology and imaging antenna catheter may further include an ablation tip, and such embodiment may be used as an intracardiac device to both deliver energy to selected areas of tissue and visualize the resulting ablation lesions, thereby greatly simplifying production of continuous linear lesions. The invention further includes embodiments useful for guiding electrophysiologic diagnostic and therapeutic procedures other than ablation. Imaging of ablation lesions may be further enhanced by use of MR contrast agents. 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. The invention further provides 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.
REFERENCES:
patent: 4295467 (1981-10-01), Mann et al.
patent: 4932411 (1990-06-01), Fritschy et al.
patent: 4989608 (1991-02-01), Ratner
patent: 5178618 (1993-01-01), Kandarpa
patent: 5217010 (1993-06-01), Tsitlik et al.
patent: 5315025 (1994-05-01), Bushell et al.
patent: 5323776 (1994-06-01), Blakeley et al.
patent: 5323778 (1994-06-01), Kandarpa et al.
patent: 5334193 (1994-08-01), Nardella
patent: 5370644 (1994-12-01), Langberg
patent: 5443489 (1995-08-01), Ben-Haim
patent: 5447156 (1995-09-01), Dumoulin et al.
patent: 5662108 (1997-09-01), Budd et al.
patent: 5685878 (1997-11-01), Falwell et al.
patent: 5779669 (1998-07-01), Haissaguerre et al.
patent: 5833608 (1998-11-01), Acker
patent: 5868674 (1999-02-01), Glowinski et al.
patent: 5916162 (1999-06-01), Snelten et al.
patent: 5928145 (1999-07-01), Ocali et al.
patent: 5928159 (1999-07-01), Eggers et al.
patent: 5964705 (1999-10-01), Truwit et al.
patent: 6027500 (2000-02-01), Buckles et al.
patent: 6128522 (2000-10-01), Acker et al.
patent: 6129670 (2000-10-01), Burdette et al.
patent: 6171240 (2001-01-01), Young et al.
patent: 6226545 (2001-05-01), Gilderdale
patent: 6238390 (2001-05-01), Tu et al.
patent: 6263229 (2001-07-01), Atalar et al.
patent: 6272370 (2001-08-01), Gillies et al.
patent: 6332089 (2001-12-01), Acker et al.
patent: 6408202 (2002-06-01), Lima et al.
patent: 6428537 (2002-08-01), Swanson et al.
patent: 6690963 (2004-02-01), Ben-Haim et al.
patent: 6701176 (2004-03-01), Halperin et al.
patent: 6904307 (2005-06-01), Karmarkar et al.
patent: 466 424 (1992-01-01), None
patent: 557 127 (1993-08-01), None
patent: 9-94238 (1997-04-01), None
patent: WO 87/04080 (1987-07-01), None
patent: WO 92/10213 (1992-06-01), None
patent: WO 94/23782 (1994-10-01), None
Atalar Ergin
Berger Ronald D.
Calkins Hugh
Halperin Henry R.
Lardo Albert
Johns Hopkins University School of Medicine
Mantis Mercader Eleni
Nixon & Vanderhye P.C.
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