Lesion assessment using six degree of freedom ultrasound thermography

摘要

A diagnostic device and method for assessing lesion formation by measuring temperature changes during endocardial ablation. Intracardiac echo catheter data is accurately mapped into a model maintained by a visualization, navigation, or mapping system using the position and orientation of the intracardiac echo catheter transducer within the model. For each point in the model, either a frequency shift or echo time shift is calculated from the intracardiac echo data to determine local temperature changes, and the local temperature changes are displayed within a rendering of the model for the user.

主权项

1. A diagnostic system comprising:
an intracardiac echo catheter having an ultrasound transducer configured to generate a first ultrasound echo data set and a second ultrasound echo data set representative of the received ultrasonic energy; a visualization, navigation, or mapping (VNM) system configured to generate a model of a body cavity, track the position of the ultrasound transducer within the model, generate one or more voxel elements within the model, and generate a two dimensional rendering of the model, the VNM system being further configured to receive the first ultrasound echo data set and generate a first mapped value by mapping at least a portion of the first ultrasound echo data set onto the one or more voxel elements, the VNM system being further configured to receive the second ultrasound echo data set and generate a second mapped value by mapping at least a portion of the second ultrasound data set onto the one or more voxel elements; a display device configured to display a graphical user interface; an electronic control unit (ECU) in communication with the intracardiac echo catheter, the VNM system, and the display device and being configured to receive the first ultrasound echo data set, the second ultrasound echo data set, the two dimensional rendering, and one or more user inputs directing the control of one or more of the intracardiac catheter and the VNM system, the ECU being further configured to generate a graphic user interface containing at least the two dimensional rendering; wherein the VNM system compares the first mapped value with the second mapped value to generate a temperature change value.