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相关概念视频

Assessment of apical radial pulse01:25

Assessment of apical radial pulse

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Apical-Radial (A-R) Pulse Assessment
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
Pre-Procedural Preparation
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Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

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Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
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Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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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...
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Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
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Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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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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相关实验视频

Updated: May 2, 2026

Three-Dimensional Printing of a Complex Aortic Anomaly
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Three-Dimensional Printing of a Complex Aortic Anomaly

Published on: November 1, 2018

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学习基于稀疏注释的三维大动脉根评估.

Johanna Brosig1,2,3, Nina Krüger1,2,3, Inna Khasyanova2,3,4

  • 1Fraunhofer Institute for Digital Medicine MEVIS, Bremen, Germany.

Journal of medical imaging (Bellingham, Wash.)
|August 1, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的方法,用于使用二维注释对大动脉和左心室外流通道 (LVOT) 进行细分,简化了用于跨导管大动脉植入 (TAVI) 规划的数据生成.

关键词:
标注注释 标注注释动脉动脉根的动脉动脉根.左心室的外流通道是左心室的外流通道细分化 细分化的细分化穿过导管的大动脉植入装置.

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Three-Dimensional Imaging of Aortic Tissues in Atherosclerosis

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相关实验视频

Last Updated: May 2, 2026

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03:40

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科学领域:

  • 医学成像分析分析 医学成像分析
  • 计算解剖学的计算解剖学
  • 心血管成像 - 心血管成像

背景情况:

  • 对大动脉和左心室外流通道 (LVOT) 的准确分析对于跨导管大动脉植入 (TAVI) 风险评估和规划至关重要.
  • 当前的细分方法通常需要大量的注释数据,这对监督深度学习模型构成了挑战.

研究的目的:

  • 开发一种方法,尽量减少注释复杂性,用于训练大动脉根和LVOT的自动化3D细分网络.
  • 为了促进培训数据的生成,以进行患者特定的解剖分析.

主要方法:

  • 提出了一种使用2D横截面注释和基于点云的表面重建的新方法.
  • 训练了一个全自动的3D细分网络用于大动脉根和LVOT.
  • 从细分结果中推导出TAVI规划的临床相关参数.

主要成果:

  • 在2D注释方面达成了高水平的观察者间共识 (Dice相似系数 [DSC]:0.94).
  • 分段模型显示DSC为0.90和平均表面距离为0.96毫米.
  • 预测和注释之间的大动脉环最大直径差异为0.45毫米.

结论:

  • 提出的方法可以实现可重现的注释,促进准确的细分模型的训练.
  • 分段化结果提供了可重现和可量化的测量,对TAVI规划至关重要.
  • 这种方法简化了分析大动脉和LVOT解剖学的数据生成.