Steady-state 4D flow using double gating: a healthy volunteer study
نویسندگان
چکیده
Background 4D Phase-Contrast MRI ("4D Flow”) has become a choice modality for assessment of flow patterns in complex vasculatures, such as congenital heart diseases. For thoracic imaging, the technique relies on ECG-triggering and an imaging navigator to compensate for breathing motion [Markl-JMRI2007]. The acquisition of the navigator requires switching off the 4D flow acquisition, thus breaking the steady-state and missing a phase in the cardiac cycle. We propose to use double gating from ECG and a pressure-driven belly-belt to monitor breathing motion while maintaining continuous steady-state.
منابع مشابه
Whole-heart four-dimensional flow can be acquired with preserved quality without respiratory gating, facilitating clinical use: a head-to-head comparison
BACKGROUND Respiratory gating is often used in 4D-flow acquisition to reduce motion artifacts. However, gating increases scan time. The aim of this study was to investigate if respiratory gating can be excluded from 4D flow acquisitions without affecting quantitative intracardiac parameters. METHODS Eight volunteers underwent CMR at 1.5 T with a 5-channel coil (5ch). Imaging included 2D flow ...
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