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首页> 外文期刊>Journal of magnetic resonance imaging: JMRI >Direct comparison of sensitivity encoding (SENSE) accelerated and conventional 3D contrast enhanced magnetic resonance angiography (CE-MRA) of renal arteries: effect of increasing spatial resolution.
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Direct comparison of sensitivity encoding (SENSE) accelerated and conventional 3D contrast enhanced magnetic resonance angiography (CE-MRA) of renal arteries: effect of increasing spatial resolution.

机译：肾动脉的敏感性编码（SENSE）加速和常规3D对比增强磁共振血管造影（CE-MRA）的直接比较：增加空间分辨率的效果。

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PURPOSE: To assess the effect of attaining higher spatial resolution in contrast-enhanced magnetic resonance angiography (MRA) of renal arteries using parallel imaging, sensitivity encoding (SENSE), by comparing the SENSE contrast-enhanced (CE) MRA against a conventional CE-MRA protocol with identical scan times, injection protocol, and other acquisition parameters. MATERIALS AND METHODS: Numerical simulations and a direct comparison of SENSE-accelerated versus conventional acquisitions were performed. A total of 41 patients (18 male) were imaged using both protocols for a direct comparison. Both protocols used fluoroscopic triggering, centric encoding, breath-holding, equivalent injection protocol, and lasted approximately 30 seconds. RESULTS: Simulated point-spread functions were narrower for the SENSE protocol compared to the conventional protocol. In the patient study, although the SENSE protocol produced images with lower signal-to-noise ratio (SNR), image quality was better for all segments of the renal arteries. In addition, ringing of kidney parenchyma and renal artery blurring were significantly reduced in the SENSE protocol. Finally, reader confidence improved with the SENSE protocol. CONCLUSION: Despite a reduction in SNR, the higher-resolution SENSE CE-MRA provided improved image quality, reduced artifacts, and increased reader confidence compared to the conventional protocol.
机译：目的：通过将SENSE对比增强（CE）MRA与常规CE-具有相同扫描时间，进样协议和其他采集参数的MRA协议。材料与方法：进行了数值模拟和SENSE加速与常规采集的直接比较。使用这两种方案对总共41位患者（18位男性）进行了成像以进行直接比较。两种方案均使用荧光镜触发，中心编码，屏气，等效注射方案，并且持续约30秒。结果：与常规协议相比，SENSE协议的模拟点扩展功能更窄。在患者研究中，尽管SENSE协议产生的图像具有较低的信噪比（SNR），但对于肾动脉的所有部分，图像质量均较好。此外，SENSE方案显着减少了肾实质的振铃和肾动脉模糊。最后，SENSE协议提高了读者的信心。结论：尽管SNR有所降低，但与常规协议相比，高分辨率SENSE CE-MRA可以提供更高的图像质量，更少的伪像并提高了阅读器的置信度。

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