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相关概念视频

Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
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Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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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Magnetic Resonance Imaging01:24

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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相关实验视频

Updated: Jan 9, 2026

High-resolution Structural Magnetic Resonance Imaging of the Human Subcortex In Vivo and Postmortem
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使用低成本的MRI扫描仪进行体内成像,并在低资源环境中进行云数据处理.

Teresa Guallart-Naval, Robert Asiimwe, Patricia Tusiime

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    研究人员在非洲升级了一台低成本,低场的MRI扫描仪,实现了临床相关的大脑成像质量. 这表明了在低资源环境中可访问的磁共振成像 (MRI) 的潜力.

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    科学领域:

    • 医疗成像医学成像
    • 生物物理学的生物物理.
    • 工程 工程师 工程师 工程师

    背景情况:

    • 低场磁共振成像 (MRI) 系统为资源有限的环境中医疗诊断提供了潜在的成本效益高的解决方案.
    • 运营方面的挑战,包括电磁噪声和电力不稳定性,阻碍了MRI在资源不足的环境中得到广泛采用.
    • 开发可持续的MRI技术需要解决硬件局限性,并优化软件以应对具有挑战性的条件.

    研究的目的:

    • 展示在非洲开发和运行的低成本,低场MRI扫描仪的体内成像能力.
    • 为了说明如何有针对性的硬件和软件增强可以克服在低资源设置中的操作限制.
    • 在一个升级,负担得起的系统上验证先进的MRI技术的可行性.

    主要方法:

    • 一台46mT的哈尔巴赫MRI扫描仪经历了重大升级,包括改进了接地,屏蔽和新的控制电子与开源软件.
    • 使用标准化协议严格评估噪声性能.
    • 进行了三维 (3D) 罕见序列脑成像,通过使用磁场地图的基于云的重建实现了扭曲校正.

    主要成果:

    • 升级后的MRI系统实现了噪声水平明显低于热极限,确保了稳定的运行.
    • 成功获得了高质量的3DT1和T2加权脑图像.
    • 有效地应用了扭曲校正,通过远程GPU处理实现了近实时可视化.

    结论:

    • 通过有效管理电磁干扰和功率波动,通过低成本系统可以实现临床相关的MRI图像质量.
    • 这项研究证实了在低资源地区开发可持续MRI技术的可行性.
    • 未来的临床转换取决于确保稳定的电源供应,并培养MRI操作和维护的当地专业知识.