RF driven resistive ablation system for use in MRI guided therapy
First Claim
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1. An ablation system comprising:
- an ablation device having an operating tip for guidance by a physician into a treatment position adjacent target tissues in a patient;
a resistive element mounted in the ablation device near said operating tip;
conductors positioned in the ablation device and connected to the resistive element, said conductors extending from the operating tip toward a non-operating end of the ablation device;
a MRI system for acquiring image data from the patient being treated and being operable to display an image reconstructed from the acquired image data which depicts location of the operating tip of the ablation device in the patient; and
an ablation control system including a power source coupled to the conductors to deliver alternating current to the resistive element for treating the target tissues, the alternating current being above a predetermined frequency at which gradient coils of the MRI system are switched and being below the Larmor frequency of the MRI system.
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Abstract
An MRI system acquires NMR image data to produce real time anatomic images as an ablation device is guided into contact with target tissues in a patient to be thermally treated. The ablation device includes a resistive element at its operating end which receives alternating current from an ablation control system. The resistive element produces therapeutic heat that treats the target tissues.
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Citations
10 Claims
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1. An ablation system comprising:
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an ablation device having an operating tip for guidance by a physician into a treatment position adjacent target tissues in a patient;
a resistive element mounted in the ablation device near said operating tip;
conductors positioned in the ablation device and connected to the resistive element, said conductors extending from the operating tip toward a non-operating end of the ablation device;
a MRI system for acquiring image data from the patient being treated and being operable to display an image reconstructed from the acquired image data which depicts location of the operating tip of the ablation device in the patient; and
an ablation control system including a power source coupled to the conductors to deliver alternating current to the resistive element for treating the target tissues, the alternating current being above a predetermined frequency at which gradient coils of the MRI system are switched and being below the Larmor frequency of the MRI system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification