Dynamic reference method and system for interventional procedures
View Patent ↗An interventional device configured for placement in or near an internal organ or tissue is provided. The interventional device includes a reference portion having three or more sensor elements. In one implementation, the interventional device and associated sensor elements provide dynamic referencing of the internal organ, tissue or associated vasculature after registration of the sensor data with images and/or volumetric representations of the internal organ or tissue.
1. An interventional device comprising:
a catheter that is suitable for placement proximate to or inside an internal organ such that the catheter moves with the internal organ, wherein the catheter is not physically attached to the internal organ when so placed; and
three or more electromagnetic sensor coils integrated in a non-linear arrangement on a curved portion of the catheter, wherein the three or more electromagnetic sensor coils are each sized differently from one another, wherein the three or more electromagnetic sensor coils each provides at least position information, and wherein the electromagnetic sensor coils are configured to be registered to the corresponding position information in a radiographic image based on the size differences between electromagnetic sensor coils.
2. The interventional device of claim 1 further comprising one or more receiving components configured to detect positional and/or directional signals generated by the three or more electromagnetic sensor coils.
3. The interventional device of claim 1 further comprising one or more antennas configured to detect electromagnetic fields generated by the three or more electromagnetic sensor coils.
4. The interventional device of claim 1 further comprising one or more transmitters configured to generate electromagnetic fields detectable by the three or more electromagnetic sensor coils.
5. The interventional device of claim 1 wherein each electromagnetic sensor coil further provides position information in three dimensions and orientation information in two directions.
6. The interventional device of claim 1 wherein the three or more electromagnetic sensor coils are in fixed relation to one another such that the combination of the three or more electromagnetic sensor coils further provide position information in three dimensions and orientation information in three directions.
7. The interventional device of claim 1 further comprising a power supply electrically connected to the three or more electromagnetic sensor coils.