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Acceleration of 2D-MR fingerprinting by reducing the number of echoes with increased in-plane resolution: a volunteer study.
Magnetic Resonance Materials in Physics Biology and Medicine ( IF 2.3 ) Pub Date : 2020-04-04 , DOI: 10.1007/s10334-020-00842-8
Yusuke Yokota 1 , Tomohisa Okada 2 , Yasutaka Fushimi 1 , Akira Yamamoto 1 , Satoshi Nakajima 1 , Koji Fujimoto 2 , Sonoko Oshima 1 , Gregor Koerzdoerfer 3 , Mathias Nittka 3 , Josef Pfeuffer 3 , Kaori Togashi 1
Affiliation  

OBJECTIVE To compare the absolute values and repeatability of magnetic resonance fingerprinting (MRF) with 3000 and 1500 echoes/slice acquired in 41 s and 20 s (MRF3k and MRF1.5k, respectively). MATERIALS AND METHODS MRF3k and MRF1.5k scans based on fast imaging with steady precession (FISP) were conducted using a 3 T scanner. Inter-scan agreement and intra-scan repeatability were investigated in 41 and 28 subjects, respectively. Region-of-interest (ROI) analysis was conducted on T1 values of MRF3k by two raters, and their agreement was evaluated using intraclass correlation coefficients (ICCs). Between MRF3k and MRF1.5k, differences in T1 and T2 values and inter-measurement correlation coefficients (CCs) were investigated. Intra-measurement repeatability was evaluated using coefficients of variation (CVs). A p value < 0.05 was considered statistically significant. RESULTS The ICCs of ROI measurements were 0.77-0.96. Differences were observed between the two MRF scans, but the CCs of the overall ROIs were 0.99 and 0.97 for the T1 and T2 values, respectively. The mean and median CVs of repeatability were equal to or less than 1.58% and 3.13% in each of the ROIs for T1 and T2, respectively; there were some significant differences between MRF3k and MRF1.5k, but they were small, measuring less than 1%. DISCUSSION Both MRF3k and MRF1.5k had high repeatability, and a strong to very strong correlation was observed, with a trend toward slightly higher values in MRF1.5k.

中文翻译:

通过增加面内分辨率减少回波数量来加速 2D-MR 指纹识别:一项志愿者研究。

目的 比较磁共振指纹 (MRF) 的绝对值和重复性与在 41 秒和 20 秒内获得的 3000 和 1500 回波/切片(分别为 MRF3k 和 MRF1.5k)。材料和方法 MRF3k 和 MRF1.5k 基于稳定进动快速成像 (FISP) 的扫描是使用 3 T 扫描仪进行的。分别在 41 名和 28 名受试者中研究了扫描间一致性和扫描内重复性。由两名评估者对 MRF3k 的 T1 值进行感兴趣区域 (ROI) 分析,并使用组内相关系数 (ICC) 评估他们的一致性。在 MRF3k 和 MRF1.5k 之间,研究了 T1 和 T2 值以及测量间相关系数 (CC) 的差异。使用变异系数 (CV) 评估测量内的可重复性。p 值 < 0。05 被认为具有统计学意义。结果 ROI 测量的 ICC 为 0.77-0.96。在两次 MRF 扫描之间观察到差异,但 T1 和 T2 值的整体 ROI 的 CC 分别为 0.99 和 0.97。在 T1 和 T2 的每个 ROI 中,重复性的平均和中值 CV 分别等于或小于 1.58% 和 3.13%;MRF3k 和 MRF1.5k 之间存在一些显着差异,但它们很小,不到 1%。讨论 MRF3k 和 MRF1.5k 都具有很高的可重复性,并且观察到很强到非常强的相关性,MRF1.5k 的值趋向于略高。分别。在 T1 和 T2 的每个 ROI 中,重复性的平均和中值 CV 分别等于或小于 1.58% 和 3.13%;MRF3k 和 MRF1.5k 之间存在一些显着差异,但它们很小,不到 1%。讨论 MRF3k 和 MRF1.5k 都具有很高的可重复性,并且观察到很强到非常强的相关性,MRF1.5k 的值趋向于略高。分别。在 T1 和 T2 的每个 ROI 中,重复性的平均和中值 CV 分别等于或小于 1.58% 和 3.13%;MRF3k 和 MRF1.5k 之间存在一些显着差异,但它们很小,不到 1%。讨论 MRF3k 和 MRF1.5k 都具有很高的可重复性,并且观察到很强的相关性,MRF1.5k 的值趋向于稍高一些。
更新日期:2020-04-22
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