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相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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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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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Brain Imaging01:14

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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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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 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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相关实验视频

Updated: May 3, 2026

Lesion Explorer: A Video-guided, Standardized Protocol for Accurate and Reliable MRI-derived Volumetrics in Alzheimer's Disease and Normal Elderly
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有效的切片补丁选择变压器用于可解释的阿尔茨海默病诊断,使用结构性MRI.

Gongpeng Cao, Manli Zhang, Yiping Wang

    IEEE journal of biomedical and health informatics
    |November 24, 2025
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    此摘要是机器生成的。

    这项研究介绍了SPSFormer,这是一个高效的AI模型,用于使用脑MRI查阿尔茨海默病 (AD). 它降低了计算成本,并提高了临床使用的可解释性.

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    科学领域:

    • 神经成像是一种神经成像.
    • 人工智能的人工智能
    • 医学诊断 医学诊断 医学诊断

    背景情况:

    • 结构磁共振成像 (sMRI) 对早期阿尔茨海默病 (AD) 检测至关重要.
    • 视觉转换器 (ViT) 对sMRI分析具有前景,但在临床环境中面临着计算和解释性挑战.

    研究的目的:

    • 为基于sMRI的AD诊断开发一个高效和可解释的AI框架.
    • 为了减少计算开销,并提高ViTs用于AD查的临床适用性.

    主要方法:

    • 提出了切片补丁选择变压器 (SPSFormer) 框架,该框架选择性地关注相关的sMRI切片和补丁.
    • 利用轻量级可学习的得分器和可差异化的Top-k操作员进行高效,端到端的训练.
    • 在多个数据集 (NACC,ADNI,AIBL) 中使用Deit和Swin识别器验证模型.

    主要成果:

    • 与现有的ViT相比,SPSFormer降低了计算要求 (GFLOP) 的2至4倍,同时保持了诊断准确性.
    • 确定了与AD神经病理学相关的关键大脑区域 (海马体,杏仁体,丘脑),提高了模型的解释性.
    • 通过与认知/生物标志物措施的关联和预后价值来预测从轻度认知障碍转化为AD的预后价值,证明了神经生物学有效性.

    结论:

    • SPSFormer为使用sMRI进行AD检测提供了一个计算高效和可解释的AI解决方案.
    • 该框架的效率和可解释性融合为AD诊断中可靠,临床部署的AI铺平了道路.
    • 突出了深度学习中针对性特征选择在医学成像分析中的潜力.