A dual-projection respiratory self-gating technique for whole-heart coronary MRA.
A dual-projection respiratory self-gating technique for whole-heart coronary MRA.
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DOI：
10.1002/jmri.21479
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发表时间：
2008-09
影响因子：
4.4
通讯作者：
Li, Debiao
中科院分区：
文献类型：
--
作者：
Lai, Peng;Larson, Andrew C.;Bi, Xiaoming;Jerecic, Renate;Li, Debiao
目的探讨双投影呼吸自门控（DP-RSG）技术在自由呼吸全心脏磁共振冠状动脉成像（MRA）中测量动态心脏位置的准确性及其可行性。提出了一种DP-RSG方法，通过获取两个全心脏投影来实现心脏位置的精确直接测量。在14名志愿者中，我们通过与血管导航仪（NAV）和基于单投影的呼吸自门控（SP-RSG）方法的比较，定量评估了DP-RSG的有效性。对于DP-RSG，我们还比较了质心和两个轮廓匹配算法在推导心脏运动。采用回顾性门控方法对8例志愿者进行冠状动脉成像，初步验证DP-RSG用于全心冠状动脉MRA的有效性。比较不同门控方法重建图像的血管轮廓。定量评估表明，DP-RSG比NAV更准确地跟踪心脏运动，所有门控窗口（GW）值和SP-RSG方法，GW ≥2.5mm，轮廓匹配算法比质心计算更可靠的运动推导，GW ≥1.0mm。全心脏冠状动脉MRA研究证明了使用DP-RSG改善冠状动脉整体勾画的可行性。与传统NAV和SP-RSG相比，DP-RSG是一种很有前途的方法，可以更好地解决全心冠状动脉MRA的呼吸运动。
To investigate the accuracy of a dual-projection respiratory self-gating (DP-RSG) technique in dynamic heart position measurement and its feasibility for free-breathing whole-heart coronary MR angiography (MRA). A DP-RSG method is proposed to enable accurate direct measurement of heart position by acquiring two whole-heart projections. On 14 volunteers, we quantitatively evaluated the efficacy of DP-RSG by comparison with diaphragmatic navigator (NAV) and single-projection-based respiratory self-gating (SP-RSG) methods. For DP-RSG, we also compared center-of-mass and two profile-matching algorithms in deriving heart motion. Coronary imaging was conducted on 8 volunteers based on retrospective gating to preliminarily validate the effectiveness of DP-RSG for whole-heart coronary MRA. Comparison of vessel delineation was performed between images reconstructed using different gating methods. The quantitative evaluation shows that DP-RSG more accurately tracks heart motion than NAV with all gating window (GW) values and SP-RSG approaches with GW ≥2.5mm and profile-matching algorithms are more reliable for motion derivation than center-of-mass calculations with GW ≥1.0mm. Whole-heart coronary MRA studies demonstrate the feasibility of using DP-RSG to improve overall delineation of the coronary arteries. DP-RSG is a promising approach to better resolve respiratory motion for whole-heart coronary MRA compared to conventional NAV and SP-RSG.
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影响因子：
6.4
作者：
Bi, Xiaoming;Deshpande, Vibhas;Li, Debiao
通讯作者：
Li, Debiao
影响因子：
5
作者：
Danias, PG;Stuber, M;Manning, WJ
通讯作者：
Manning, WJ
影响因子：
3.3
作者：
Spuentrup, E;Manning, WJ;Stuber, M
通讯作者：
Stuber, M
影响因子：
3.3
作者：
WANG, Y;RIEDERER, SJ;EHMAN, RL
通讯作者：
EHMAN, RL
影响因子：
19.7
作者：
Nehrke, K;Börnert, P;Böck, JC
通讯作者：
Böck, JC