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相关概念视频

Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

14
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...
14
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

12
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

22
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...
22
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

38
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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相关实验视频

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Combined Near-infrared Fluorescent Imaging and Micro-computed Tomography for Directly Visualizing Cerebral Thromboemboli
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使用近红外光学断层扫描对脑血管进行成像:一项模拟研究

D Yacheur1, M Ackermann2, T Li2

  • 1Biomedical Optics Research Laboratory (BORL), Department of Neonatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland. djazia.yacheur@uzh.ch.

Advances in experimental medicine and biology
|October 16, 2023
PubMed
概括

近红外光学断层扫描 (NIROT) 提供了一种非侵入性方法来可视化大脑血管. 这项研究开发了一种动态时间域NIROT技术,实现精确的成像与低误差率.

关键词:
大脑血管的大脑血管图像成像是一种成像.近红外光学断层扫描近红外光学断层扫描.

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科学领域:

  • 生物医学光学 生物医学光学
  • 医疗成像医学成像
  • 神经成像是一种神经成像.

背景情况:

  • 大脑静脉对于手术前规划和大脑氧化监测至关重要.
  • 像MRA这样的现有成像技术具有局限性,包括长时间的扫描时间和对比剂的要求.
  • 近红外光学断层扫描 (NIROT) 是一种有前途的非侵入性方法,用于评估大脑血管系统.

研究的目的:

  • 开发一种非侵入性,无标签,动态时间域 (TD) 的NIROT系统,用于成像脑血管.
  • 通过结合现实的头部模型的模拟来评估系统的性能.

主要方法:

  • 使用NIRFAST软件进行模拟,使用有限元法 (FEM) 进行光传播建模.
  • 从MRI图像中获得的简单和现实的头网被使用.
  • 一个混合FEM-U-Net网络被用于图像重建.

主要成果:

  • 开发的TD-NIROT技术成功地可视化了表面大脑血管.
  • 图像实现了根平均平方误差 (RMSE) 低于0.079.
  • 混合FEM-U-Net方法在重建船舶图像方面表现出有效性.

结论:

  • 非侵入性,无标签的TD-NIROT是一种可行的成像脑血管系统的方法.
  • 模拟结果支持该技术在临床应用中的潜力,例如中风检测.
  • 进一步开发可以提高其用于更深层次的大脑结构成像的能力.