Preliminary investigation of respiratory self-gating for free-breathing segmented cine MRI
Preliminary investigation of respiratory self-gating for free-breathing segmented cine MRI
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DOI：
10.1002/mrm.20331
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发表时间：
2005-01-01
影响因子：
3.3
通讯作者：
Simonetti, OP
中科院分区：
文献类型：
--
作者：
Larson, AC;Kellman, P;Simonetti, OP
Segmented cine MRI generally requires breath-holding, which can be problematic for many patients. Navigator echo techniques, particularly successful for free-breathing coronary MRA, are incompatible with the acquisition strategies and SSFP pulse sequences commonly used for cine MRI. The purpose of this work is to introduce a new self-gating technique deriving respiratory gating information directly from the raw imaging data acquired for segmented cine MRI. The respiratory self-gating technique uses interleaved radial k-space sampling to provide low-resolution images in real time during the free-breathing acquisition that are compared to target expiration images. Only the raw data-producing images with high correlation to the target images are included in the final high-resolution reconstruction. The self-gating technique produced cine series with no significant differences in quantitative image sharpness to series produced using comparable breath-held techniques. Because of the difficulties associated with breath-holding, the respiratory self-gating technique represents an important practical advance for cardiac MRI. Published 2004 Wiley-Liss, Inc.
