Ultrasound Particle Velocimetry: an emerging technique in cardiology
文献类型：会议论文
| 作者 | Hairong Zheng; Robin Shandas |
| 出版日期 | 2008 |
| 会议名称 | 2008 IEEE International Ultrasonics Symposium |
| 会议地点 | Beijing |
| 英文摘要 | Development and progression of vascular atherosclerosis and aneurysms are modulated by local hemodynamics such as wall shear stress and blood flow recirculation. However, current non-invasive imaging techniques either cannot resolve the multi-component nature of such flows or are too cumbersome for routine clinical use. We have recently developed a novel contrast-based echo particle image velocimetry technique (Echo PIV) to quantify complex blood flow vectors noninvasively. The method is angle independent, possesses excellent spatial and temporal resolution, and is simpler to use than MRI velocimetry. Here we examine the utility of this method to characterize hemodynamics around carotid plaques and abdominal aortic aneurysms using in vitro phantoms. A custom-designed Echo PIV system, including a 7.5 MHz 128-element linear array transducer, custom-designed firing sequences, and a velocimetry algorithm for analyzing the backscattered radio-frequency (RF) data, was used along with commercially available ultrasound contrast microbubbles to obtain velocity vectors through models of carotid stenosis and abdominal aortic aneurysms. Both steady and pulsatile flows were used. Echo PIV was able to resolve and quantify the complex hemodynamics around carotid plaques and abdominal aortic aneurysms, including proximal flow velocity vectors and distal vortex recirculation patterns. The method was also capable of producing time-resolved multi-component velocity, shear stress and vorticity maps. Good agreement between peak velocities found by Echo PIV and those measured by conventional ultrasound Doppler was also found. |
| 收录类别 | 其他 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/2305]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 作者单位 | 2008 |
| 推荐引用方式 GB/T 7714 | Hairong Zheng,Robin Shandas. Ultrasound Particle Velocimetry: an emerging technique in cardiology[C]. 见:2008 IEEE International Ultrasonics Symposium. Beijing. |
入库方式： OAI收割
来源：深圳先进技术研究院
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