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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

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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

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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.
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Imaging Studies I: CT and MRI01:14

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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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まとめ
この要約は機械生成です。

脳年齢ギャップ（BAG）は、主観的認知低下（SCD）および軽度認知障害（MCI）を有する個人における認知症の進行を予測する。BAGは、認知低下の早期段階において、視覚的評価スケール（VRS）に対する付加価値を提供する。

キーワード:
脳年齢ギャップ認知症主観的認知低下軽度認知障害磁気共鳴画像法人工知能

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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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科学分野:

  • 神経画像; 医療における人工知能; 認知神経学

背景:

  • 早期の認知症検出は介入のために重要です。; 視覚的評価スケール（VRS）はMRI上の脳萎縮を評価しますが、疾患の早期段階では限界があります。; AI分析MRIから導出される脳年齢ギャップ（BAG）は、認知症関連の脳の変化を検出する可能性を示しています。

研究 の 目的:

  • BAGが主観的認知低下（SCD）および軽度認知障害（MCI）を有する個人における認知症の進行を予測できるかどうかを評価すること。; 従来のVRSと比較してBAGの追加的な予測値を評価すること。

主な方法:

  • 前向き追跡調査を受けた757人の個人（SCD 391人、MCI 366人）のMRIデータを分析しました。; BrainageRソフトウェアを使用して、T1 MRIスキャンからBAGを計算しました。; Cox回帰モデルを使用して、認知症の進行に対するBAGおよびVRSの予測値を評価しました。

主要な成果:

  • 224人の参加者が認知症に進行しました。; BAGはSCDおよびMCIの両方のグループで認知症への進行を著しく予測しました。; BAGはVRSよりも追加の予測値を提供し、特にVRSが有意な予測力を示さなかったSCDグループで顕著でした。

結論:

  • BAGは、SCDおよびMCIを有する個人における認知症の進行の貴重な予測因子です。; BAGは、認知低下の早期段階（SCD）においてVRSよりも優れた予測能力を示します。; BAGは、早期認知症リスク評価を改善するための重要な可能性を秘めています。