EFFECTS OF LUNGE ON THE BODY SURFACE POTENTIALSIN A REALISTIC TORSO MODEL
人体躯干模型中肺的存在对体表电位分布的影响

A realistic 3-D torso model, which includes the heart and lung and retains the relative size and position of them within the body, was used to test the effects of the lung on body surface potentials. The boundary element method was used to construct a transfer matrix relating the epicardial potentials to the body surface potentials, for the inhomogeneous form of the model. The body surface potentials were obtained from the assumed epicardial potentials with a dsingle ipole or double dipoles in the inhomogeneous field respectively, and compared with those in the homogeneous field. The results show that although the lung has very little effect on the maximal potential and the minimal one at the same nodes, they changed the potentials of other nodes seriously. In the other words, the relative errors of the body surface potentials between the fields attain to 73.6%, and the correlative coefficient is 0.851.