Free breathing 1H MRI of the human lung with an improved radial turbo spin-echo
Free breathing 1H MRI of the human lung with an improved radial turbo spin-echo
复制标题
使用改进的径向涡轮自旋回波进行人肺自由呼吸 1H MRI
DOI:
10.1007/s10334-014-0468-x
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Jakob PM
中科院分区:
文献类型:
--
作者:
Völker M;Ehses P;Weick S;Breuer FA;Blaimer M;Hintze C;Biederer J;Jakob PM
ObjectiveTo optimize a radial turbo spin-echo sequence for motion-robust morphological lung magnetic resonance imaging (MRI) in free respiration.Materials and methodsA versatile multi-shot radial turbo spin-echo (rTSE) sequence is presented, using a modified golden ratio-based reordering designed to prevent coherent streaking due to data inconsistencies from physiological motion and the decaying signal. The point spread function for a moving object was simulated using a model for joint respiratory and cardiac motion with a concomitant T2signal decay and with rTSE acquisition using four different reordering techniques. The reordering strategies were compared in vivo using healthy volunteers and the sequence was tested for feasibility in two patients with lung cancer and pneumonia.ResultsSimulations and in vivo measurements showed very weak artifacts, aside from motion blur, using the proposed reordering. Due to the opportunity for longer scan times in free respiration, a high signal-to-noise ratio (SNR) was achieved, facilitating identification of the disease as compared to standard half-Fourier-acquisition single-shot turbo spin-echo (HASTE) scans. Additionally, post-processing allowed modifying the T2contrast retrospectively, further improving the diagnostic fidelity.ConclusionThe proposed radial TSE sequence allowed for high-resolution imaging with limited obscuring artifacts. The radialk-space traversal allowed for versatile post-processing that may help to improve the diagnosis of subtle diseases.
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影响因子:
3.8
作者:
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通讯作者:
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影响因子:
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影响因子:
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作者:
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通讯作者:
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