Ensuring respiratory phase consistency to improve cardiac function quantification in real-time CMR.
Ensuring respiratory phase consistency to improve cardiac function quantification in real-time CMR.
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DOI:
10.1002/mrm.29064
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发表时间:
2022-03
影响因子:
3.3
通讯作者:
Ahmad R
中科院分区:
文献类型:
--
作者:
Chen C;Chandrasekaran P;Liu Y;Simonetti OP;Tong M;Ahmad R
To develop an automatic method for selecting heartbeats with consistent respiratory phase to improve accuracy of cardiac function quantification in real-time (RT) cardiac MRI. The respiratory signal is extracted by a principal component analysis method from RT cine images. Then, a two-step procedure is used to determine the directionality (sign) of the respiratory signal. With the motion in a manually selected region-of-interest as reference, the quality of the extracted respiratory signal is assessed using multi-slice RT cine data from eleven volunteers and ten patients. In addition, the impact of selecting heartbeats with consistent respiratory phase on the cardiac function quantification is evaluated. The extracted respiratory signal using the proposed method exhibits a high, positive correlation with the reference in all cases and is more robust compared to a recently proposed method. Also, for right ventricular (RV) function quantification, selecting heartbeats at expiratory position improves agreement between RT cine and breath-held reference. The proposed method enables fully automatic extraction and directionality determinations of respiratory signal from RT cardiac cine images, allowing accurate cardiac function quantification.
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DOI:
10.1152/ajpheart.00752.2013
发表时间:
2014-03-01
影响因子:
4.8
作者:
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通讯作者:
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影响因子:
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通讯作者:
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