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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：直接比较敏感性编码（意义）加速和常规3D对比增强肾动脉的常规3D对比增强磁共振血管造影（CE-MRA）：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：利用并行成像，灵敏度编码（SENSE）通过比较传统的CE-使用平行成像，灵敏度编码（意义）来评估肾动脉对比增强磁共振血管造影（MRA）较高空间分辨率的效果。 MRA协议具有相同的扫描时间，注射协议和其他采集参数。材料和方法：进行数值模拟和感应加速与传统采集的直接比较。使用两种协议进行直接比较共进行41名患者（18只雄性）。这两种协议使用荧光透视触发，中心编码，呼吸套，等效注射方案，并持续大约30秒。结果：与传统协议相比，仿真点传播功能对感应协议较窄。在患者研究中，虽然感测方案产生了具有较低信噪比（SNR）的图像，但是对于肾动脉的所有区段更好的图像质量。此外，在感应方案中，肾脏实质和肾动脉模糊的振温显着降低。最后，阅读器协议的读者置信度改善了。结论：尽管SNR降低，但与传统方案相比，较高分辨率感应CE-MRA提供了改善的图像质量，减少的伪影和增加的读者置信度。

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