Abstract:
The invention relates to a system for determining electrical characteristics like electrical potentials on a surface of a heart (5). An esophageal electrode structure (6) measures electrical characteristics within an esophagus and a position determination unit (34) determines the position of the esophageal electrode structure within the esophagus and the position of the surface of the heart (5). The electrical characteristics on the surface of the heart (5) are then determined based on the measured electrical characteristics and based on the determined positions of the esophageal electrode structure (6) and the surface of the heart (5). Since for measuring the electrical characteristics the esophageal electrode structure (6) is used, the electrical characteristics can be measured within the esophagus and thus close to the surface of the heart (5), thereby allowing for an improved accuracy of determining the electrical characteristics on the surface of the heart (5).
Abstract:
The invention relates to an interventional system comprising an introduction element (4) such as a catheter for being introduced into an object (9), for instance, a person. A moving unit (2) such as a robot moves the introduction element within the object, wherein a tracking image generating unit (3) generates, using a radiation beam (7), tracking images of the introduction element within the object and wherein a controller (8) controls the tracking image generating unit depending on movement parameters of the moving unit, which are indicative of the movement. The control operation of controller (7) allows reducing radiation dose applied to the object.