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相关概念视频

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

370
Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
370
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

261
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
261
Computed Tomography01:10

Computed Tomography

7.9K
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...
7.9K
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

261
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...
261
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

296
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,...
296
Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

454
The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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相关实验视频

Updated: Jan 9, 2026

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
04:40

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans

Published on: August 28, 2018

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对比的冠状动脉化 图像检索 在计算机断层扫描中

Rui Castro, Rui Santos, Vitor M Filipe

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |December 3, 2025
    PubMed
    概括

    这项研究引入了一个AI图像检索系统,以提高冠状动脉 (CAC) 扫描的解释性. 该系统提高了AI模型的准确性,并提供了更清晰的视觉示例,用于更好地诊断冠状动脉疾病的临床决策.

    科学领域:

    • 心脏病学 心脏病学
    • 医疗成像医学成像
    • 人工智能的人工智能

    背景情况:

    • 心血管疾病,特别是冠状动脉疾病,是全球主要的死亡原因.
    • 冠状动脉 (CAC) 扫描是预测冠状动脉事件的关键非对比CT检查.
    • 目前用于CAC细分的深度学习模型由于其黑子性质而缺乏可解释性.

    研究的目的:

    • 开发一种可解释的图像检索管道,用于冠状动脉.
    • 提高CAC细分中的深度学习模型的可解释性.
    • 为临床医生提供视觉上类似的冠状动脉化的例子.

    主要方法:

    • 实施一个监督的对比框架用于图像检索.
    • 使用COCA数据集来评估检索管道.
    • 将检索系统与深度CAC细分模型集成.

    主要成果:

    • 在获取的图像中,为动脉标签实现了0.944 ± 0.230的标签精度.
    • 在化区域和Agatston分数中显示出中等相似性.
    • 展示了检索系统纠正和改进深度CAC细分模型的能力,提高了稳定性和可解释性.

    更多相关视频

    Author Spotlight: Advancing Cardiovascular Imaging - Introducing the Spatially Weighted Calcium Score for Early Disease Detection
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    Author Spotlight: Advancing Cardiovascular Imaging - Introducing the Spatially Weighted Calcium Score for Early Disease Detection

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    Author Spotlight: Enhanced Quantification of Cardiovascular Calcification Progression for Longitudinal Micro PET/CT Studies in Small Research Animals
    08:02

    Author Spotlight: Enhanced Quantification of Cardiovascular Calcification Progression for Longitudinal Micro PET/CT Studies in Small Research Animals

    Published on: November 15, 2024

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    相关实验视频

    Last Updated: Jan 9, 2026

    Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
    04:40

    Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans

    Published on: August 28, 2018

    15.9K
    Author Spotlight: Advancing Cardiovascular Imaging - Introducing the Spatially Weighted Calcium Score for Early Disease Detection
    06:57

    Author Spotlight: Advancing Cardiovascular Imaging - Introducing the Spatially Weighted Calcium Score for Early Disease Detection

    Published on: September 22, 2023

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    Author Spotlight: Enhanced Quantification of Cardiovascular Calcification Progression for Longitudinal Micro PET/CT Studies in Small Research Animals
    08:02

    Author Spotlight: Enhanced Quantification of Cardiovascular Calcification Progression for Longitudinal Micro PET/CT Studies in Small Research Animals

    Published on: November 15, 2024

    939

    结论:

    • 拟议的图像检索管道显著提高了CAC细分的可解释性.
    • 该系统改进了动脉特定标签,并提供了解剖学上准确的结果.
    • 这种方法旨在增加临床医生对人工智能辅助冠状动脉疾病诊断的信心.