| 摘要 |
The invention provides new materials and devices for EKG gating and defibrillation that alleviate problems in the art. Embodiments of the invention utilize special electrodes of certain dimensions and made from materials that can generate trigger signals or transmit pulses more reliably and/or with less interference to other diagnostic procedures. The electrodes and systems improve the amplitude and overall reliability of detecting EKG signals. The improved signals enable more reliable detection of a true cardiac phase and improved cardiac gating. Thus, embodiments of the invention lead to improved image quality, more accurate imaging of cardiac and intrathoracic/upper abdominal structures and improved referencing of systemic arterial blood flow for blood flow measurement within the chest and elsewhere in the body, including, for example, the extremities.
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