Simultaneous estimation of tongue volume and fat fraction using IDEAL-FSE.
Simultaneous estimation of tongue volume and fat fraction using IDEAL-FSE.
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DOI：
10.1002/jmri.21431
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发表时间：
2008-08
影响因子：
4.4
通讯作者：
Robbins, JoAnne
中科院分区：
文献类型：
--
作者：
Humbert, Ianessa A.;Reeder, Scott B.;Porcaro, Eva J.;Kays, Stephanie A.;Brittain, Jean H.;Robbins, JoAnne
目的：确定用Idea-FSE(具有回声不对称和最小二乘估计的水和脂肪迭代分解)获得的高分辨率、高信噪比(SNR)舌象是否能提供与传统的非脂肪抑制FSE成像相当的体积测量方法，并确定使用Idea-FSE成像估计成人舌脂比例的可行性。健康志愿者接受了使用理想FSE序列和传统FSE序列的舌部磁共振成像。手动勾画舌头轮廓以得出体积和脂肪分数的测量结果。组内相关系数(ICCs)用于测量可靠性，Spearman等级相关检验Idea-FSE与传统舌体积测量之间的关系。在相同的扫描时间内，理想快速自旋回波成像与常规快速自旋回波成像的容积测量值几乎相同(理想快速自旋回波序列平均64.1cm~3；常规平均63.3cm~3；r=0.988，P≤0.01)。所有参与者的平均脂肪信号分数为26.5%。所有测量指标的内部可靠性都很好(ICC0.92)。我们的结果表明，Idea-FSE提供了与目前和以前研究中获得的常规FSE成像相似的舌体体积估计。在旨在增加吞咽和言语障碍人群的舌肌力量和体积的研究中，舌脂肪成分的理想-FSE测量可能是有用的。
To determine whether high-resolution, high signal-to-noise ratio (SNR) images of the tongue acquired with IDEAL-FSE (iterative decomposition of water and fat with echo asymmetry and least squares estimation) will provide comparable volumetric measures to conventional nonfat-suppressed FSE imaging and to determine the feasibility of estimating the proportion of lingual fat in adults using IDEAL-FSE imaging. Healthy volunteers underwent magnetic resonance imaging of the tongue using both IDEAL-FSE and conventional FSE sequences. The tongue was manually outlined to derive both volumetric and fat fraction measures. Intraclass correlation coefficients (ICCs) were computed for intrarater measurement reliability and Spearman’s rank correlation tested the relationship between IDEAL-FSE and conventional volumetric measures of the tongue. IDEAL-FSE imaging yielded almost identical volumetric measures to that of conventional FSE imaging in the same amount of scan time (IDEAL-FSE mean 64.1 cm3; conventional mean 63.3 cm3; r = 0.988, P ≤0.01). The average fat signal fraction across participants was 26.5%. Intrarater reliability was excellent for all measures (ICC ≥ 0.92). Our results indicate that IDEAL-FSE provided similar lingual volume estimates to conventional FSE imaging obtained in both the current and previous studies. IDEAL-FSE measures of lingual fat composition may be useful in studies that aim to increase lingual muscle strength and volume in swallowing and speech-disordered populations.
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