Cine flow measurements using phase contrast with undersampled projections: in vitro validation and preliminary results in vivo.
Cine flow measurements using phase contrast with undersampled projections: in vitro validation and preliminary results in vivo.
复制标题
使用相衬和欠采样投影进行电影流测量：体外验证和体内初步结果。
DOI：
10.1002/jmri.20715
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Grist,ThomasM
中科院分区：
文献类型：
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作者：
Wentland,AndrewL;Korosec,FrankR;Vigen,KarlK;Wieben,Oliver;Fine,JasonP;Grist,ThomasM
目的使用 2D 电影相差 (PC) 欠采样径向采集方法评估扫描时间短于屏气期间的体外和体内流量测量的准确性，这可能有助于测量流量，特别是在呼吸过程中运动的血管中。材料和方法对于体外评估，在各种流速和欠采样因子下对流模型进行成像。为了进行体内评估，对五名正常受试者进行了成像，并将主动脉的流速与髂动脉的流速总和进行比较。结果对于体外结果，流量测量的准确性保持在扫描时间低至 13-17 秒的情况下。对于体内结果，在不到 25 秒的时间内获得的扫描提供了主动脉中的流量测量值，与髂动脉中的流量测量值的总和很好地对应。 结论 欠采样径向采集电影 PC 技术在流动模型和健康人类志愿者中提供了准确的流量测量值，扫描时间比典型的屏气时间短。 J.马格。共振。成像 2006 年。© 2006 Wiley-Liss, Inc.
PurposeTo assess the accuracy of flow measurements in vitro and in vivo during scan times shorter than a breath‐hold using a 2D cine phase contrast (PC) undersampled radial acquisition method, which may be useful for measuring flow, especially in vessels subject to motion during respiration.Materials and MethodsFor in vitro assessment, a flow phantom was imaged at various flow rates and undersampling factors. For in vivo assessment, five normal subjects were imaged and the flow rate in the aorta was compared with the sum of the flow rates in the iliac arteries.ResultsFor results in vitro, the accuracy of flow measurements was maintained with scan times as low as 13–17 seconds. For results in vivo, scans acquired in less than 25 seconds provided flow measurements in the aorta that corresponded well to the sum of flow measurements in the iliac arteries.ConclusionThe undersampled radial acquisition cine PC technique provided accurate flow measurements in a flow phantom and in healthy human volunteers in scan times shorter than a typical breath‐hold. J. Magn. Reson. Imaging 2006. © 2006 Wiley‐Liss, Inc.