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Alzheimer's Disease: Overview01:26

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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
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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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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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Brain Imaging01:14

Brain Imaging

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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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Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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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.
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Computed Tomography (CT) scan:
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アルツハイマー病イメージングコンソーシアム

Lawrence P Binding1, Mihaela Croitor1, Christopher S Parker1

  • 1UCL Hawkes Institute and Department of Computer Science, University College London, London, UK.

Alzheimer's & dementia : the journal of the Alzheimer's Association
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PubMed
まとめ
この要約は機械生成です。

アルツハイマー病(AD)はしばしば混合病理を呈し、診断を困難にします。新しいソフトウェアであるAdditional Pathology Inference(AddiPath)は、タウ沈着と他の病理とを区別できるようになったため、診断精度が向上しました。

キーワード:
アルツハイマー病タウTDP-43病理バイオマーカーイメージングAddiPath診断臨床試験

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Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
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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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Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
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科学分野:

  • 神経科学; バイオマーカー発見; 医用画像診断

背景:

  • アルツハイマー病(AD)はしばしば混合病理を呈し、非タウ病理のバイオマーカーが限られているため、生体内診断が複雑になります。; 皮質厚(CT)の萎縮は、タウ沈着とTDP-43などの他の病理の両方によって影響を受けます。; 既存のタウPETバイオマーカーは、これらの寄与を区別するのに役立ちます。

研究 の 目的:

  • 一次タウ病理以外の疾患バイオマーカーの変化を特定するためのAdditional Pathology Inference(AddiPath)ソフトウェアを導入すること。; タウ沈着に起因しない皮質厚(CT)の変化を検出するために、AddiPathをタウPETデータに適用すること。

主な方法:

  • 444人のアルツハイマー病神経画像イニシアチブ(ADNI)被験者のペアになったタウPETおよびCTデータを分析しました。; タウPETにおけるサブタイプおよび病期推論(SuStaIn)を利用して、タウ病理サブタイプを特定しました。; 地域別CT値に対するタウおよび追加病理の寄与を定量化するためにAddiPathを適用し、進行パターンを推定しました。

主要な成果:

  • SuStaInは、後部、辺縁系、皮質などの異なるタウ沈着サブタイプを特定しました。; AddiPathは、海馬傍回から始まり脳全体に広がる独立した病理進行パターンを明らかにしました。; 84人の参加者が追加の病理の証拠を示しました。AddiPathの病期が進むにつれて、認知機能(記憶、言語、実行機能)の低下と相関し、タウ負荷とは独立していました。

結論:

  • AddiPathは、アルツハイマー病における一次タウ病理からの追加病理の寄与を効果的に分離します。; タウでは説明できないCTの変化を発見し、特に辺縁葉においてTDP-43沈着を示唆する可能性があります。; この方法は、AD研究における臨床試験の募集と患者層別化を強化する可能性を秘めています。