32 results about "Mri compatibility" patented technology

A tubular insert for a vessel comprises an inner stent and an outer stent. At least a portion of the inner stent is disposed within the outer stent. The outer stent has a longitudinal axis and is constructed to be free of any closed loops which are electrically conductive and which are disposed about the longitudinal axis such that the longitudinal axis passes through the closed loop. The inner stent has a longitudinal axis and is constructed so as to be free of any closed loops which are electrically conductive and which are disposed about the longitudinal axis such that the longitudinal axis passes through the closed loop. There is a substantially electrically non-conductive connection between the inner and outer stents. Desirably, a wall surface is defined by the outer and inner stents, and there are no closed, electrically conductive loops in the wall surface of the tubular insert.

A TANK filter is provided for a lead wire of an active medical device (AMD). The TANK filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the TANK filter is resonant at a selected frequency. The Q of the inductor may be relatively maximized and the Q of the capacitor may be relatively minimized to reduce the overall Q of the TANK filter to attenuate current flow through the lead wire along a range of selected frequencies. In a preferred form, the TANK filter is integrated into a TIP and / or RING electrode for an active implantable medical device.

Various embodiments concern leads having low peak MRI heating for improved MRI compatibility. Various leads include a lead body having at least one lumen, a proximal end configured to interface with an implantable medical device, and a distal end. Such leads can further include a conductor extending along at least a portion of the lead body within the at least one lumen and a defibrillation coil extending along an exterior portion of the lead body and in electrical connection with the conductor, wherein at least a section of the defibrillation coil is under longitudinal compression. The longitudinal compression can lower peak MRI heating along the defibrillation coil. The longitudinal compression may maintain circumferential contact between adjacent turns of the section of the defibrillation coil.

The invention relates to an MRI compatible full-automatic mammary gland focus positioning biopsy robot system. The MRI compatible full-automatic mammary gland focus positioning biopsy robot system comprises a vacuum suction biopsy instrument and a six-degree-of-freedom positioning robot system, wherein the vacuum suction biopsy instrument comprises a puncture biopsy needle and a power system host; the six-degree-of-freedom positioning robot system comprises a machine body structure and a driving system; the power system host comprises a host body; and the machine body structure comprises a positioning structure, an orientation structure and a puncture structure; the positioning structure has three degrees of freedom, the orientation structure has two degrees of freedom, and the puncture structure has one degree of freedom. The MRI compatible full-automatic mammary gland focus positioning biopsy robot system has the advantages that a full-automatic mammary gland puncture positioning robot has complete MRI compatibility, and real-time MRI image navigation of mammary gland focus sampling and automatic setting of one-time needle insertion and multiple sampling can be achieved under the assistance of a mammary gland vacuum suction rotary cutting biopsy system.