Comprehensive Evaluation of B(1)(+)-corrected FISP-based Magnetic Resonance Fingerprinting: Accuracy, Repeatability and Reproducibility of T(1) and T(2) Relaxation Times for ISMRM/NIST System Phantom and Volunteers.
Comprehensive Evaluation of B(1)(+)-corrected FISP-based Magnetic Resonance Fingerprinting: Accuracy, Repeatability and Reproducibility of T(1) and T(2) Relaxation Times for ISMRM/NIST System Phantom and Volunteers.
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DOI：
10.2463/mrms.mp.2019-0016
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发表时间：
2020-08-03
期刊：
影响因子：
--
通讯作者：
Naganawa S
中科院分区：
文献类型：
--
作者：
Kato Y;Ichikawa K;Okudaira K;Taoka T;Kawaguchi H;Murata K;Maruyama K;Koerzdoerfer G;Pfeuffer J;Nittka M;Naganawa S
本研究旨在综合评价；使用稳态进动校正快速成像 (FISP-MRF)，通过磁共振指纹法测量 T1 和 T2 弛豫时间的准确性、重复性和再现性。使用 FISP-MRF 原型序列对国际医学磁共振协会/美国国家标准与技术研究所 (ISMRM/NIST) 体模进行了 100 天的扫描，并对六名健康志愿者进行了 5 天的扫描。通过将 FISP-MRF 测量的弛豫时间与体模制造商提供的参考值进行比较来评估体模的准确性。每日重复性的特征是模型 100 天内和志愿者 5 天内测量的变异系数 (CV)。此外，还对志愿者进行了跨扫描仪再现性的评估。在体模研究中，FISP-MRF 的 T1 和 T2 值与体模的参考值表现出很强的线性相关性（T1 的 R2 = 0.9963；T2 的 R2 = 0.9966）。对于大于 300 ms 的 T1 值，CV 小于 1.0%；对于较宽范围内的 T2 值，CV 小于 3.0%。在志愿者研究中，除一名受试者外，T1 和 T2 值的 CV 均<5.0%。此外，体内 FISP-MRF 估计的所有 T2 值均低于先前研究中报道的传统作图序列测量的值。 T1 和 T2 的跨扫描仪变化显示志愿者的两种不同扫描仪之间具有良好的一致性。 -校正后的 FISP-MRF 在模型和志愿者研究中显示出可接受的准确性、重复性和再现性。
This study aimed to evaluate comprehensively; accuracy, repeatability and reproducibility of T1 and T2 relaxation times measured by magnetic resonance fingerprinting using -corrected fast imaging with steady-state precession (FISP–MRF). The International Society of Magnetic Resonance in Medicine/National Institute of Standards and Technology (ISMRM/NIST) phantom was scanned for 100 days, and six healthy volunteers for 5 days using a FISP–MRF prototype sequence. Accuracy was evaluated on the phantom by comparing relaxation times measured by FISP–MRF with the reference values provided by the phantom manufacturer. Daily repeatability was characterized as the coefficient of variation (CV) of the measurements over 100 days for the phantom and over 5 days for volunteers. In addition, the cross-scanner reproducibility was evaluated in volunteers. In the phantom study, T1 and T2 values from FISP–MRF showed a strong linear correlation with the reference values of the phantom (R2 = 0.9963 for T1; R2 = 0.9966 for T2). CVs were <1.0% for T1 values larger than 300 ms, and <3.0% for T2 values across a wide range. In the volunteer study, CVs for both T1 and T2 values were <5.0%, except for one subject. In addition, all T2 values estimated by FISP–MRF in vivo were lower than those measured with conventional mapping sequences reported in previous studies. The cross-scanner variation of T1 and T2 showed good agreement between two different scanners in the volunteers. -corrected FISP-MRF showed an acceptable accuracy, repeatability and reproducibility in the phantom and volunteer studies.
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