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Related Concept Videos

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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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.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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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.
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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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Related Experiment Video

Updated: Jan 8, 2026

Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans
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[Evaluation of brain death by computed tomography].

T Shiogai, K Takeuchi

    No to Shinkei = Brain and Nerve
    |December 1, 1983
    PubMed
    Summary

    Computed tomography (CT) can help confirm brain death by showing brain tamponade and lack of blood flow. Dynamic CT scanning is recommended for evaluating cerebral blood flow in brain death cases.

    Area of Science:

    • Neurology
    • Radiology
    • Forensic Medicine

    Background:

    • Cerebral circulation absence and electrocerebral silence are established brain death indicators.
    • Computed tomography (CT) is proposed as a confirmatory tool for diagnosing brain death.

    Purpose of the Study:

    • To evaluate computed tomography (CT) findings as confirmatory criteria for brain death.
    • To assess the utility of CT in visualizing pathological changes and cerebral blood flow in brain death.

    Main Methods:

    • CT scans were performed on 14 patients meeting conventional brain death criteria.
    • Enhanced contrast CT, including dynamic CT, was used to assess cerebral vasculature and blood flow.
    • Results were correlated with angiography in some cases.

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    Main Results:

    • "Brain tamponade" (ventricular compression/disappearance) was observed in 50% of patients.
    • Enhanced contrast CT showed cerebral vasculature in 70% of evaluated patients, suggesting improved CT demonstrability.
    • Lack of enhanced contrast in brain structures indicates absent cerebral blood flow, though some cases showed minimal flow on angiography.

    Conclusions:

    • CT is useful for confirming brain death by visualizing "brain tamponade" and absent cerebral blood flow.
    • Dynamic CT scanning is valuable for assessing cerebral blood flow in brain death.
    • Correlating dynamic CT findings with other cerebral blood flow determination methods is recommended.