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Computed Tomography01:10

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
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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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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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Alzheimer Disease ll: Pathophysiology01:23

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Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and...
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Dementia l: Introduction01:22

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Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
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Alzheimer Disease l: Introduction01:29

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Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
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Alzheimer disease: focus on computed tomography.

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    Alzheimer disease, a common dementia, involves memory loss and cognitive decline. Advanced imaging techniques like CT and MRI help detect brain changes and monitor the condition.

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    Area of Science:

    • Neurology
    • Geriatrics
    • Radiology

    Background:

    • Alzheimer disease is the leading cause of dementia, impacting millions globally.
    • Characterized by cognitive decline, memory loss, and confusion.
    • Pathological hallmarks include beta-amyloid plaques and neurofibrillary tangles.

    Purpose of the Study:

    • To review the role of radiologic imaging in Alzheimer disease detection.
    • To highlight the utility of CT and MRI in assessing disease progression.

    Main Methods:

    • Review of current literature on Alzheimer disease and neuroimaging.
    • Focus on Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) applications.

    Main Results:

    • Radiologic imaging aids in identifying Alzheimer disease's structural brain changes.
    • CT and MRI are effective for routine evaluation and monitoring disease progression.
    • Imaging helps assess overall brain function in Alzheimer patients.

    Conclusions:

    • Computed tomography and magnetic resonance imaging are essential tools for Alzheimer disease diagnosis.
    • These imaging modalities facilitate the monitoring of disease progression and brain function.
    • Radiologic imaging plays a crucial role in the clinical management of Alzheimer disease.