Proposal for 3D visualization of cardiac mechanical activity by hybrid stereo measurement

In this study, we proposed a new non-contact cardiac motion measurement for the purpose of treating cardiac mechanical activity (physical contraction / expansion mode) as clinical information. The proposed method is a hybrid method that combines passive stereo and active stereo, and simultaneously realized three-dimensional reconstruction of the chest shape and measurement of minute changes in the chest by cardiac motion. As a result of the experiment using the prototype system, it was clarified that the respiratory motion and the cardiac motion appearing in the chest can be extracted separately by the proposed method. In addition, based on the extracted signal of cardiac motion, it was clarified that the cardiac mechanical activity can be visualized by expressing the minute displacement on the chest surface due to cardiac motion as a color change.