Navigator-echo-based real-time respiratory gating and triggering for reduction of respiration effects in three-dimensional coronary MR angiography.

摘要: PURPOSE: To test the hypothesis that respiration effects in three-dimensional (3D) coronary magnetic resonance (MR) imaging can be reduced with navigator-echo-based gating or triggering according to superior-inferior position of diaphragm. MATERIALS AND METHODS: Real-time respiratory and (breath hold feedback) were implemented navigator echoes a magnetization-prepared, segmented, 3D sequence. The two techniques first tested motion phantom. An protocol compared real-time respiratory-gated acquisition, respiratory-triggered continuous acquisition was then evaluated six healthy subjects. RESULTS: superior signals averaged (P = .025). performance gated about same as triggered .05). CONCLUSION: Navigator-echo-based, ...