Fusion of extraluminal and intraluminal images using anatomical feature in intraluminal image and associated systems, devices, and methods

A system, comprising:

• an intracardiac echocardiography (ICE) catheter configured to be positioned within a heart of a patient, wherein the ICE catheter comprises an ultrasound transducer array configured to obtain ultrasound imaging data of the heart while the ICE catheter is positioned within the heart;
• a radiographic imaging device configured to obtain radiographic imaging data of the heart, wherein the radiographic imaging device comprises at least one of a pose or a geometry associated with obtaining the radiographic imaging data;
• and
• a processor circuit configured for communication with the ultrasound transducer array and the radiographic imaging device, wherein the processor circuit is configured to:
• receive the radiographic imaging data from the radiographic imaging device, wherein the radiographic imaging data depicts the ICE catheter while the ICE catheter is positioned within the heart;
• determine, based on the radiographic imaging data, a first candidate rotational orientation and a second candidate rotational orientation of the ultrasound transducer array around a longitudinal axis of the ICE catheter as a result of a size of the ICE catheter preventing determination of an actual rotational orientation of the ultrasound transducer array around the longitudinal axis based only the radiographic imaging data;
• receive the ultrasound imaging data from the ultrasound transducer array;
• receive at least one of the pose or the geometry of the radiographic imaging device;
• identify, based on the ultrasound imaging data and at least one of the pose or the geometry, an anatomical feature depicted in the ultrasound imaging data;
• select, based on the anatomical feature or motion of the anatomical feature, one of the first candidate rotational orientation or the second candidate rotational orientation as the actual rotational orientation of the ultrasound transducer array around the longitudinal axis;
• perform image fusion of the ultrasound imaging data and the radiographic imaging data based on the actual rotational orientation of the ultrasound transducer array around the longitudinal axis;
• and
• output, to a display in communication with the processor circuit, the co-registered ultrasound imaging data and radiographic imaging data.