Comparing real-world advantages for the clinical neuroradiologist between a high field (3 T), a phased array (1.5 T) vs. a single-channel 1.5-T MR system
Comparing real-world advantages for the clinical neuroradiologist between a high field (3 T), a phased array (1.5 T) vs. a single-channel 1.5-T MR system
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DOI：
10.1002/jmri.20612
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发表时间：
2006-07-01
影响因子：
4.4
通讯作者：
Knopp, Edmond A.
中科院分区：
文献类型：
--
作者：
Orbach, Darren B.;Wu, Chris;Knopp, Edmond A.
目的：为了评估信号噪声比（SNR）和神经放射学家的主观评价的图像质量在3-Telsa（3-T）或相位MR系统，现在可用于临床neuroimaging.Materials和Methods：脑MR图像的6名正常志愿者获得的三个扫描仪：1.5-T单通道系统，12通道，分相系统，和3-T单通道系统。此外，还分析了从28名在其中一个以上系统中接受成像的患者中采集的临床优化图像。SNR进行了测量，图像质量和伪影的显着性进行了分级，由两个盲reader.Results：相控阵系统产生更高的SNR比1.5 T或3 T单通道系统，并在任何情况下，它优于。两位盲法阅片者均认为相控阵列图像的质量高于单通道系统，伪影明显较少。3-T磁体产生的图像具有更高的SNR，但伪影显著性增加。相控阵系统显着减少采集时间而不引入artifaction.Conclusion：无论是定量和定性的相控阵系统提供的图像质量优于1.5 T和3 T单通道系统的上级。
Purpose: To evaluate signal-to-noise ratio (SNR) and neuroradioligists' subjective assessments of image quality in 3-Telsa (3-T) or phased MR systems that are now available for clinical neuroimaging.Materials and Methods: Brain MR images of six normal volunteers were obtained on each of three scanners: a 1.5-T single-channel system, a 12-channel, phased away system, and a 3-T single-channel system. Additionally, clinically optimized images acquired from 28 patients who underwent imaging in more than one of these systems were analyzed. SNRs were measured and image quality and artifact conspicuity were graded by two blinded readers.Results: The phased-array system produced higher SNR than either the 1.5-T or the 3-T single channel systems, and in no instance was it outperformed. Both blinded readers judged the phased-array images to be of higher quality than those produced by the single-channel systems, with significantly less artifact. The 3-T magnet produced images with higher SNR, but with increased artifact conspicuity. The phased-array system markedly decreased acquisition times without introduction of artifacts.Conclusion: Both quantitatively and qualitatively the phased-array system provided image quality superior to that of the 1.5-T and 3-T single channel systems.