![]() When the heart of a healthy subject was observed using the three-dimensional electrical distribution imaging technology developed, it was able to confirm a time difference in electrical activity between the frontal (right atrium) and the dorsal (left atrium) side. A computational method to easily match strength-levels and interpolate for the difference in frontal and dorsal electrical distribution strengths was developed, giving a smooth three-dimensional electrical current distribution. As the strength of the magnetic field depends on the distance from the heart, the strength of the reconstructed electrical distribution is also different. The three-dimensional electrical distribution map is reconstructed from magneto-cardiograms taken from the front and the back of the heart. ![]() Technology for reconstructing current distribution As a result, it is now possible to reconstruct the electrical distribution on the standard heart model without an MRI or X-ray image of the heart. Technology for position-matching on a standard heart modelĪ computational method was developed to match the position of magneto-cardiograms on to a model of an average heart, using the sino-atrial node *4) as a reference point. Given this need, Hitachi developed new technology for position-matching on a model of a standard heart and technology to reconstruct current distribution, to achieve the world's first three-dimensional imaging of the heart's current distribution.įeatures of the technology are as follows: Development of 3D imaging technology for current distribution maps was, however, also desired for multi-faceted analysis of the mechanisms of heart disease. The non-invasively obtained magneto-cardiograms present a two-dimensional electrical distribution map, and provide a method for early detection of heart diseases such as arrhythmia and angina pectoris. The magneto-cardiograph was commercialized by Hitachi High-Technologies Corporation in March 2003, and is capable of measuring cardiac activity while clothed and in a short time. Further, the electro-cardiograph is used to record data from the front of the heart, but it was difficult to measure the back of the heart.Īs a new technology for heart disease screening, Hitachi developed a magneto-cardiograph system *1) capable of detecting the very weak magnetic field *2) formed on the surface of the body as a result of cardiac activity, using a special magnetic sensor called SQUID *3). The electro-cardiograph is widely used as a simple method to screen for heart disease, however, as it is not capable of providing detailed data with high sensitivity, echocardiography or methods using radio isotopes are employed. Heart disease is the number two cause of death in Japan today. This technology is expected to find clinical applications such as the clarification of the mechanisms of heart failure, development of new diagnostic methods, etc. As the entire heart can be observed at once, it is possible to visually catch electrophysiological phenomena. The technology uses magneto-cardiographs taken from the front and back of the heart, and reconstructs the current distribution on a 3D model of the heart. (NYSE:HIT / TSE:6501), has developed magneto-cardiograph visualization technology enabling 3D imaging of the electrical current distribution associated with cardiac activity for the first time in the world. Enabling simultaneous inspection of the back of the heart. Development of magneto-cardiograph 3-D visualization of heart current distribution
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