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
复制
发表时间:
2015
期刊:
Magnetic Resonance Materials in Physics, Biology and Medicine
影响因子:
--
通讯作者:
Jakob PM
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

文献摘要

参考文献

被引文献

相似文献

目的优化径向涡轮自旋回波序列的运动鲁棒形态肺磁共振成像(MRI)在自由呼吸.Materials和methodsA通用的多拍径向涡轮自旋回波(rTSE)序列,提出了一种基于黄金分割率的重新排序,旨在防止相干条纹由于数据不一致的生理运动和衰减信号。运动物体的点扩散函数使用一个模型进行模拟,用于联合呼吸和心脏运动,伴随T2信号衰减和rTSE采集,使用四种不同的重新排序技术。重新排序的策略进行了比较,在体内使用健康志愿者和序列进行了测试,在肺癌和pneumonia.ResultsSimulations和在体内测量的可行性显示非常弱的文物,除了运动模糊,使用建议的重新排序。由于在自由呼吸中有机会进行更长的扫描时间,因此实现了高信噪比(SNR),与标准半傅立叶采集单次激发快速自旋回波(HASTE)扫描相比,有助于识别疾病。此外,后处理允许修改T2对比回顾性,进一步提高诊断fidelity.ConclusionThe建议径向TSE序列允许有限的模糊伪影的高分辨率成像。径向空间遍历允许多功能的后处理,这可能有助于改善细微疾病的诊断。
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.
DOI: 10.1118/1.598577
发表时间: 1999-05-01
期刊: MEDICAL PHYSICS
影响因子: 3.8
作者:
Lujan, AE;Larsen, EW;Ten Haken, RK
通讯作者: Ten Haken, RK
DOI: 10.1002/jmri.20319
发表时间: 2005-06-01
影响因子: 4.4
作者:
Stadler, A;Jakob, PM;Bankier, AA
通讯作者: Bankier, AA
DOI: 10.1002/nbm.1940070112
发表时间: 1994-03-01
期刊: NMR IN BIOMEDICINE
影响因子: 2.9
作者:
DETRE, JA;ZHANG, WG;LEIGH, JS
通讯作者: LEIGH, JS
DOI: 10.1002/jmri.21235
发表时间: 2008
影响因子: 4.4
作者:
A. Fischer;E. Pracht;J. F. Arnold;M. Kotas;M. Flentje;P. Jakob
通讯作者: P. Jakob
DOI: 10.1016/s0720-048x(98)00167-3
发表时间: 1999-02-01
影响因子: 3.3
作者:
Hatabu, H;Gaa, J;Edelman, RR
通讯作者: Edelman, RR