Motion of the Proximal Renal Artery
Motion of the Proximal Renal Artery
复制标题
近端肾动脉的运动
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
M. D. Haan
中科院分区：
文献类型：
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作者：
M. Kaandorp;M. D. Haan
导言肾动脉的对比增强磁共振血管成像必须在屏气时进行，以消除呼吸运动引起的伪影[I]。然而，由于血压和血流的脉动，肾动脉在心脏频率上也表现出二次运动。呼吸运动主要影响肾动脉远端，而这种继发运动主要影响近端肾动脉。由于单次屏气的可用扫描时间相对较短(最大25套)，目前的肾血管造影技术不包括任何形式的心脏同步。为了研究这些技术的有效性，我们使用心脏触发的MR定量血流测量技术，在一大群高血压患者中检测了近端肾动脉的运动。本文报告的定量信息随后可用于决定肾脏磁共振血管成像中的空间分辨率和心脏同步性问题。
Introduction Contrast-enhanced MR angiography of the renal arteries is necessarily performed during a breathhold to eliminate the artifacts due to respiratory motion [I]. However, the renal arteries also show a secondary motion at the cardiac frequency due to the pulsating blood pressure and flow. Respiratory motion mainly affects the distal part of the renal arteries, whereas this secondary motion mainly affects the proximal renal arteries. Due to the relatively short available scan-time in a single breathhold (max. 25 set), current techniques for renal angiography do not incorporate any form of cardiac synchronization. To investigate the validity of these techniques, we have determined the motion of the proximal renal arteries in a large group of hypertensive patients using cardiac triggered MR Quantitative Flow measurements. The quantitative information reported here can subsequently be used to decide on issues of spatial resolution and cardiac synchronization in renal MR angiography.