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Respiratory displacement and velocity measurement using navigator MRI echo signals
Respiratory displacement and velocity measurement using navigator MRI echo signals
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机译:使用导航仪MRI回波信号测量呼吸位移和速度
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摘要
Navigator signals (348) are acquired during a cardiac gated MRI scan to measure the position and velocity components of respiratory motion. Acquired cardiac image views are discarded and/or corrected based on the measurement of the positional and velocity components of respiratory motion to reduce motion artifacts. In one embodiment the navigator pulse sequence includes velocity encoding gradient (340, 356), and in a second embodiment, velocity is determined by measuring the change in diaphragm position between successive navigator pulse sequences (324, 236). IMAGE
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