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相关概念视频

Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Applications of Integration to Find Blood Flow

Blood flow through a cylindrical blood vessel can be mathematically described using the principles of laminar flow, a regime in which fluid moves smoothly in parallel layers. In this model, the velocity of the blood is not uniform across the cross-section of the vessel; rather, it varies with the radial distance from the center. The maximum velocity occurs along the central axis, decreasing progressively toward the vessel walls, where it reaches zero due to viscous drag.Approximating Blood...

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相关实验视频

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Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
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用基于图像的计算流量分析来验证孤立的上层中枢动脉剖析的分类系统.

Xuehuan Zhang1, Jiale Chen1, Chenyang Qiu2

  • 1School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China.

Computer methods and programs in biomedicine
|August 15, 2024
PubMed
概括

这项研究验证了Qiu分类系统用于使用计算流体动力学进行隔离上层中枢动脉剖析 (ISMAD). 在ISMAD类型中发现了血液动力学差异,支持了分类.

关键词:
孤立的上半导体动脉剖析的分类计算流体动力学 计算流体动力学虚假光线结构 虚假光线结构功能验证的功能验证孤立的上层中枢动脉剖析.真正的光线通透度 真正的光线通透度

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科学领域:

  • 血管外科 血管外科
  • 医疗成像医学成像
  • 计算流体动力学的流体动力学.

背景情况:

  • 隔离上层中枢动脉解剖 (ISMAD) 是一种罕见的,危及生命的血管疾病.
  • 现有的ISMAD分类系统缺乏标准化和验证.
  • 血液动力学参数对于理解ISMAD进展和治疗至关重要.

研究的目的:

  • 为了计算验证最新的Qiu分类系统用于ISMAD.
  • 在不同的ISMAD分类中分析血液动力学参数.
  • 通过模拟来帮助ISMAD的临床决策.

主要方法:

  • 62名ISMAD患者使用Qiu系统 (类型I-V,类型P/S) 进行分类.
  • 计算机断层扫描血管学数据集用于计算流体动力学和结构分析.
  • 关键的血液动力学参数包括流量,压力下降,壁切应力 (TAWSS,OSI) 和RRT被量化.

主要成果:

  • 在ISMAD型号之间观察到TAWSS,OSI和RRT的显著差异.
  • 第四种类型显示出更高的TAWSS;第二种类型显示出更高的OSI;第四种类型的RRT较低.
  • 与P型相比,S型表现出较高的压力下降,梯度,OSI和RRT.

结论:

  • 血液动力学分析支持Qiu分类系统对ISMAD的有效性.
  • 基于模拟的血液动力学评估可以识别ISMAD风险.
  • 这些发现可以指导ISMAD患者的治疗策略.