论文部分内容阅读
心磁图(MCG)是近十年发展的一种新方法,它是用灵敏的磁检测器探测临近体外由心电引起的微弱磁场。在每次心脏搏动早期体内建立了电场,心电图(ECG)就是记录身体表面的电位差,心脏电活动面的电位差超过0.1伏,然而体表所能引出的电压实际上只有2至3毫伏。心脏的电动势在体内还引起电流,并由此转变为磁场。心脏活动所产生的磁场非常微弱,在前胸面最大磁场强度为地磁场的百万分之一,即约1微高斯。直到1963年Baule和McFee才第一
Magnetocardiography (MCG) is a new method developed in recent ten years. It uses a sensitive magnetic detector to detect the faint magnetic field caused by electrocardiogram in vitro. An electric field is established in each heartbeat at an early stage of the heartbeat. An electrocardiogram (ECG) records the potential difference on the surface of the body. The potential difference between the active surfaces of the heart surpasses 0.1 volt. However, the body surface can draw only 2 to 3 millivolts . The electromotive force of the heart also causes a current flow in the body and thus changes to a magnetic field. The magnetic field produced by heart activity is very weak with a maximum magnetic field strength in the anterior chest of one millionth of the Earth’s magnetic field, ie, about 1 micro-gauss. It was not until 1963 that Baule and McFee first