Reproducibility of liver R2* quantification for liver iron quantification from cardiac R2* acquisitions.

Reproducibility of liver R2* quantification for liver iron quantification from cardiac R2* acquisitions.
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根据心脏R2* 采集的肝脏铁定量的肝脏R2* 定量重现性。

DOI:
10.1007/s00261-021-03099-4
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发表时间:
2021-09
期刊:
Abdominal radiology (New York)
影响因子:
--
通讯作者:
Reeder SB
Reeder SB
中科院分区:
其他
文献类型:
--
作者:
Muehler MR;Vigen K;Hernando D;Zhu A;Colgan TJ;Reeder SB

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评估 2D 心脏心电图门控和 3D 屏气肝脏 CSE-MRI 采集之间肝脏 R2* 测量的可重复性,以进行肝脏铁定量。共纳入 51 名受试者(18 名女性,36 名男性,年龄 35.2±21.8 岁)的 54 次 1.5 T MRI 检查。其中包括两项子研究,其中包括 23 项临床 MRI 检查,这些检查来自回顾性识别的 19 名患者、24 名已知或疑似铁超负荷的参与者以及前瞻性获得的 7 名健康志愿者。 2D 心脏和 3D 肝脏 R2* 图是在同一检查中获取的。两次采集均使用复杂的 R2* 算法进行重建,该算法考虑了涡流引起的脂肪误差和残余相位误差的存在。使用肝脏中的共定位 ROI 分析数据。线性回归分析表明,整体研究和两项子研究均具有较高的皮尔逊相关性和林氏一致性系数。 Bland-Altman 分析也显示出良好的一致性,除了平均 R2* 值略有增加到 ~ 400 s−1 以上。 Kolmogorow-Smirnow 检验揭示了 (R2* 3D–R2* 2D) 值从 0 到 600 s−1 的非正态分布,与 0–200 s−1 和 0–400 s−1 亚群相比。线性回归分析显示,除了截距之外,没有其他相关差异,这可能是由于只有 7 个测量值高于 400 s−1。结果表明,使用 2D 心脏 R2* 图与 3D 肝脏 R2* 图作为参考相比,在肝脏中进行 R2* 测量是可行的。使用 2D 心脏 R2* 映射方法,对于 R2* > 400 s−1,肝脏 R2* 可能会被低估。
To evaluate the reproducibility of liver R2* measurements between a 2D cardiac ECG-gated and a 3D breath-hold liver CSE-MRI acquisition for liver iron quantification. A total of 54 1.5 T MRI exams from 51 subjects (18 women, 36 men, age 35.2 ± 21.8) were included. These included two sub-studies with 23 clinical MRI exams from 19 patients identified retrospectively, 24 participants with known or suspected iron overload, and 7 healthy volunteers acquired prospectively. The 2D cardiac and the 3D liver R2* maps were acquired in the same exam. Either acquisitions were reconstructed using a complex R2* algorithm that accounts for the presence of fat and residual phase errors due to eddy currents. Data were analyzed using colocalized ROIs in the liver. Linear regression analysis demonstrated high Pearson’s correlation and Lin’s concordance coefficient for the overall study and both sub-studies. Bland–Altman analysis also showed good agreement, except for a slight increase of the mean R2* value above ~ 400 s−1. The Kolmogorow–Smirnow test revealed a non-normal distribution for (R2* 3D–R2* 2D) values from 0 to 600 s−1 in contrast to the 0–200 s−1 and 0–400 s−1 subpopulations. Linear regression analysis showed no relevant differences other than the intercept, likely due to only 7 measurements above 400 s−1. The results demonstrate that R2*-measurements in the liver are feasible using 2D cardiac R2* maps compared to 3D liver R2* maps as the reference. Liver R2* may be underestimated for R2* > 400 s−1 using the 2D cardiac R2* mapping method.
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发表时间: 2008-02-01
影响因子: 3.3
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