Improvements in carotid plaque imaging using a new eight-element phased array coil at 3T.

Improvements in carotid plaque imaging using a new eight-element phased array coil at 3T.
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DOI:
10.1002/jmri.21890
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发表时间:
2009-11
影响因子:
4.4
通讯作者:
Hayes, Cecil
Hayes, Cecil
中科院分区:
医学2区
文献类型:
--
作者:
Balu, Niranjan;Yarnykh, Vasily L.;Scholnick, Joshua;Chu, Baocheng;Yuan, Chun;Hayes, Cecil

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设计并比较用于颈动脉成像的8通道相控阵(PA)线圈与已建立的4通道相控阵设计。设计了一种专门用于颈动脉分叉成像的八通道PA (8PA)线圈,并与现有的四通道(4PA)线圈设计进行了比较,采用了虚拟体和体内黑血磁共振成像(MRI)。比较了8PA和4PA的覆盖范围、信噪比(SNR)和噪声对比比(CNR)。8PA在深度为3.5 cm时的信噪比提高了1.7倍,在给定的信噪比下,在幻影上的纵向覆盖范围更大。8PA在高空间分辨率(0.63 mm2) PD、T1、T2的血管壁信噪比(分别为1.7、1.7、1.6倍,P≤0.002)和CNR(分别为1.7、1.6、1.5倍,P≤0.002)均有改善。与4PA相比,超高分辨率(0.27 mm2) t1加权图像在8PA上显示出更好的信噪比和CNR(1.4倍,P≤0.0001)。颈动脉成像研究可能受益于使用8PA提供的改进的信噪比和更大的覆盖范围。
To design and compare an eight-channel phased array (PA) coil for carotid imaging to an established four-channel PA design at 3T. An eight-channel PA (8PA) coil was designed specifically for imaging the carotid bifurcation and compared with the existing four-channel (4PA) design using a phantom and by in vivo black-blood magnetic resonance imaging (MRI). The 8PA and 4PA were compared in terms of coverage, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR). The 8PA showed up to 1.7-fold improvement in SNR at a depth of 3.5 cm and greater longitudinal coverage at a given SNR on a phantom. The 8PA showed improved vessel wall SNR for high spatial resolution (0.63 mm2) PD, T1, and T2 (1.7, 1.7, 1.6 times, respectively; P ≤ 0.002) and improved CNR (1.7, 1.6, 1.5 times, respectively; P ≤ 0.002). Ultrahigh-resolution (0.27 mm2) T1-weighted images showed better SNR and CNR (1.4 times, P ≤ 0.0001) on 8PA compared to 4PA. Carotid imaging studies may benefit from the improved SNR and larger coverage provided by use of the 8PA.
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