多中心、多厂商体模研究，以验证使用厂商提供的六点DIXON方法计算的质子密度脂肪分数和T2*值。
Multicenter, multivendor phantom study to validate proton density fat fraction and T2* values calculated using vendor-provided 6-point DIXON methods.
作者信息
Hayashi Tatsuya, Fukuzawa Kei, Yamazaki Hidekazu, Konno Takashi, Miyati Tosiaki, Kotoku Jun'ichi, Oba Hiroshi, Kondo Hiroshi, Toyoda Keiko, Saitoh Satoshi
机构信息
Graduate School of Medical Technology, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan.
Department of Radiological Technology, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo 105-8470, Japan; Okinaka Memorial Institute for Medical Research, 2-2-2 Toranomon, Minato-ku, Tokyo 105-8470, Japan.
出版信息
Clin Imaging. 2018 Sep-Oct;51:38-42. doi: 10.1016/j.clinimag.2018.01.011. Epub 2018 Feb 2.
PURPOSE
To evaluate the reproducibility of proton density fat fraction (PDFF) and T2* in a fat-water phantom on three different 3 T MRI systems using 6-point DIXON methods.
METHODS
A phantom which included varying fat volume percentages (true fat fraction [FF]) was scanned by three 3 T MR machines, and PDFF and T2* were measured.
RESULTS
The mean difference between true FF and PDFF was small in all vendors (-2.11% to 0.41%). However, the difference ratio for T2* values was large among vendors (1.79 to 3.36).
CONCLUSIONS
True FF and PDFF were consistent across vendors; however, T2* varied greatly.
目的
使用6点DIXON方法评估三种不同的3T磁共振成像（MRI）系统在脂肪-水模体中质子密度脂肪分数（PDFF）和T2*的可重复性。
方法
用三台3T磁共振成像仪扫描一个包含不同脂肪体积百分比（真实脂肪分数[FF]）的模体，并测量PDFF和T2*。
结果
在所有供应商的设备中，真实FF与PDFF之间的平均差异较小（-2.11%至0.41%）。然而，不同供应商设备的T2*值差异率较大（1.79至3.36）。
结论
各供应商设备的真实FF和PDFF一致；然而，T2*差异很大。
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