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相关概念视频

Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

359
Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
359
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

22
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
22
Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

206
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...
206
Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

Imaging Studies for Cardiovascular System II:Types of Echocardiography

291
Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for...
291
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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相关实验视频

Updated: Jul 16, 2025

Ultrasonic Assessment of Myocardial Microstructure
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在thalassemia患者的左心室肌动脉功能障碍评估使用心声学放射性特征和机器学习算法.

Haniyeh Taleie1, Ghasem Hajianfar2, Maziar Sabouri1,3

  • 1Department of Medical Physics, Iran University of Medical Sciences, Tehran, Iran.

Journal of digital imaging
|September 22, 2023
PubMed
概括
此摘要是机器生成的。

由于铁过载而面临心力衰竭风险的β-thalassemia主要患者可以使用心声学和机器学习来识别. 这种方法提供了一种可行的方法来预测心肌铁沉积的心脏并发症.

关键词:
心脏磁共振成像心脏磁共振成像心声回声扫描 (Echocardiography) 是一种心声回声扫描.机器学习 机器学习无线电学 (Radiomics) 是一种无线电学.泰拉西米亚 泰拉西米亚

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相关实验视频

Last Updated: Jul 16, 2025

Ultrasonic Assessment of Myocardial Microstructure
10:53

Ultrasonic Assessment of Myocardial Microstructure

Published on: January 14, 2014

5.5K
Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
06:34

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

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Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice
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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:

  • 由于心肌铁沉积而引起的心力衰竭是贝塔thalassemia major中死亡的主要原因.
  • 心脏磁共振成像T2*是检测心肌铁过载的标准,但有局限性.
  • 早期发现心脏干扰对于治疗β-thalassemia major至关重要.

研究的目的:

  • 使用心声谱衍生的放射性特征和机器学习来区分具有和没有心肌铁过载的β-thalassemia主要患者.
  • 评估使用机器学习模型在患有正常左心室喷射率 (LVEF) 的患者中预测心脏铁过载的可行性.

主要方法:

  • 从44名铁过载患者 (T2* ≤20毫秒) 和47名对照患者 (T2* >20毫秒) 的末 (ES) 和末腹 (ED) 心声图像中提取了放射性特征,所有患者的LVEF>55%.
  • 使用了三种特征选择方法 (MRMR-XGB,ANOVA-MLP,RFE-KNN) 和六种分类器.
  • 模型性能使用AUC,ACC,SEN和SPE进行评估.

主要成果:

  • 在ED数据集上,MRMR-XGB模型获得了最高的性能,AUC=0.73,ACC=0.73,SPE=0.73和SEN=0.73.
  • ANOVA-MLP和RFE-KNN也在ES和联合ED&ES数据集上展示了有希望的结果.
  • 这些发现表明放射性分析在识别心肌铁过载时的潜力.

结论:

  • 从心声回声学中提取的放射性特征,结合机器学习,提供了一种可行的方法,用于预测与β-thalassemia主要患者的铁过载有关的心脏并发症.
  • 这种非侵入性方法可以补充或作为传统成像技术的替代品来监测心肌铁含量.