Pilot tone navigation for respiratory and cardiac motion-resolved free-running 5D flow MRI.
Pilot tone navigation for respiratory and cardiac motion-resolved free-running 5D flow MRI.
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DOI：
10.1002/mrm.29023
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发表时间：
2022-03
影响因子：
3.3
通讯作者：
Roy CW
中科院分区：
文献类型：
--
作者：
Falcão MBL;Di Sopra L;Ma L;Bacher M;Yerly J;Speier P;Rutz T;Prša M;Markl M;Stuber M;Roy CW
在这项工作中，我们将导频音（PT）导航系统集成到呼吸和心脏运动分辨5D流的重建框架中。我们测试了以下假设：PT将提供与先前建立的自门控（SG）技术等效的呼吸曲线、心脏触发和相应的流量测量，同时独立于采集参数的变化。15名志愿者和9名患者使用自由运行的5D血流序列进行扫描，并集成PT。在所有受试者中比较PT和SG的呼吸曲线和心脏触发。将使用PT和SG进行的5D血流重建的血流测量值相互比较，并与参考心电图门控和呼吸触发的4D血流采集进行比较。还在1名受试者中测试了每个交错读数可变的径向轨迹，以比较PT和SG之间的心脏触发质量。PT与SG呼吸曲线的相关性，志愿者为0.95 ± 0.06，患者为0.95 ± 0.04。志愿者和患者的心跳持续时间测量结果显示，PT与心电图相比对心电图测量结果的偏倚分别为0.16 ± 64.94 ms和0.01 ± 39.29 ms，SG与心电图相比对心电图测量结果的偏倚分别为0.24 ± 63.68 ms和0.09 ± 32.79 ms。未报告5D Flow PT和5D Flow SG之间的流量测量值存在显著差异。每隔行扫描的读数增加时，SG的心脏触发质量降低，而PT质量保持不变。PT已成功集成到5D Flow MRI中，并显示出与之前描述的5D Flow SG技术等效的结果，同时完全独立于采集。
In this work, we integrated the pilot tone (PT) navigation system into a reconstruction framework for respiratory and cardiac motion‐resolved 5D flow. We tested the hypotheses that PT would provide equivalent respiratory curves, cardiac triggers, and corresponding flow measurements to a previously established self‐gating (SG) technique while being independent from changes to the acquisition parameters. Fifteen volunteers and 9 patients were scanned with a free‐running 5D flow sequence, with PT integrated. Respiratory curves and cardiac triggers from PT and SG were compared across all subjects. Flow measurements from 5D flow reconstructions using both PT and SG were compared to each other and to a reference electrocardiogram‐gated and respiratory triggered 4D flow acquisition. Radial trajectories with variable readouts per interleave were also tested in 1 subject to compare cardiac trigger quality between PT and SG. The correlation between PT and SG respiratory curves were 0.95 ± 0.06 for volunteers and 0.95 ± 0.04 for patients. Heartbeat duration measurements in volunteers and patients showed a bias to electrocardiogram measurements of, respectively, 0.16 ± 64.94 ms and 0.01 ± 39.29 ms for PT versus electrocardiogram and of 0.24 ± 63.68 ms and 0.09 ± 32.79 ms for SG versus electrocardiogram. No significant differences were reported for the flow measurements between 5D flow PT and from 5D flow SG. A decrease in the cardiac triggering quality of SG was observed for increasing readouts per interleave, whereas PT quality remained constant. PT has been successfully integrated in 5D flow MRI and has shown equivalent results to the previously described 5D flow SG technique, while being completely acquisition‐independent.
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DOI：
10.1186/s12968-021-00717-4
发表时间：
2021-03-29
期刊：
Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance
影响因子：
--
作者：
Roy CW;Heerfordt J;Piccini D;Rossi G;Pavon AG;Schwitter J;Stuber M
通讯作者：
Stuber M
影响因子：
3.3
作者：
Coppo, Simone;Piccini, Davide;Stuber, Matthias
通讯作者：
Stuber, Matthias
影响因子：
3.3
作者：
Di Sopra, Lorenzo;Piccini, Davide;Yerly, Jerome
通讯作者：
Yerly, Jerome
影响因子：
5
作者：
Srichai, Monvadi B.;Lim, Ruth P.;Lee, Vivian S.
通讯作者：
Lee, Vivian S.
影响因子：
3.3
作者：
Bastkowski, Rene;Weiss, Kilian;Giese, Daniel
通讯作者：
Giese, Daniel