Comparison Between Diffusion-Weighted MRI (DW-MRI) at 1.5 and 3 Tesla: A Phantom Study
Comparison Between Diffusion-Weighted MRI (DW-MRI) at 1.5 and 3 Tesla: A Phantom Study
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DOI：
10.1002/jmri.24397
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发表时间：
2014-09-01
影响因子：
4.4
通讯作者：
Aboagye, Eric O.
中科院分区：
文献类型：
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作者：
Lavdas, Ioannis;Miquel, Marc E.;Aboagye, Eric O.
目的：比较1.5特斯拉(T)和3特斯拉(T)DW-MRI在图像质量、表观扩散系数(ADC)、重复性、病灶背景对比度和信噪比(SNR)等方面的差异。材料和方法：使用球形扩散体模对图像质量进行定性评估，并进行两场强之间的定量测量。结果：即使在最小扩散系数的情况下，失真和信号损失也会降低3T的图像质量。在大多数幻象室中，ADC值在1.5T和3T之间有显著差异(P<；0.009)，而不包括受伪影影响的幻象室的平均变异系数为
Purpose: To compare DW-MRI between 1.5 and 3 Tesla (T) in terms of image quality, apparent diffusion coefficient (ADC), reproducibility, lesion-to-background contrast and signal-to-noise ratio (SNR), using a test object.Materials and Methods: A spherical diffusion phantom was used for qualitatively assessing image quality and performing quantitative measurements between the two field strengths.Results: Distortions and signal losses degraded image quality at 3T even when the protocols were optimized for minimum TE. The ADC, in the majority of the phantom compartments, was significantly different between 1.5T and 3T (P < 0.009), while the average coefficient of variation, excluding the phantom compartments affected by artifacts, was