Patent ID: 7725161

Claim:
An MRI system comprising: an MRI scanner; an MRI catheter antenna sized and configured as an intramyocardial catheter, comprising: a non-deflectable section; a controllably deflectable section having a proximal end abutting a distal end of the non-deflectable section at an interface, wherein the deflectable section includes a deflectable tip; a first lumen extending from a proximal end of the non-deflectable section toward the deflectable section; an electrically conductive pull wire extending from the proximal end of the non-deflectable section toward the deflectable section, wherein the pull wire travels within the first lumen and is coupled at its distal end to a distal portion of an interior wall of the deflectable section; a second lumen, separate from the first lumen, extending from the proximal end of the non-deflectable section toward the deflectable section; an electrically conductive first injection needle, having a distal sharpened tip, extending from the proximal end of the non-deflectable section toward the deflectable section, wherein the first injection needle travels within the second lumen and the distal sharpened tip protrudes from or withdraws into an interior space of the deflectable section during use inside a patent's heart; an electrical connector in communication with the MRI scanner and the catheter antenna; and an electrical connection between the electrically conductive pull wire and the electrically conductive first injection needle, wherein the electrical connection forms a common electrical node between the pull wire and the first injection needle.