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Echocardiographic Assessment of the Right Heart in Mice
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用在线半自动回声心脏图边缘检测系统估计左心室腔区域
B F Vandenberg1, L S Rath, P Stuhlmuller
1Department of Internal Medicine, University of Iowa, Iowa City.
Circulation
|July 11, 1992
概括
超声心图中的实时自动边缘检测可以准确地估计内心边界. 这种可重复的方法虽然依赖于增益,但显示出评估左心室功能的临床潜力.
科学领域:
- 心血管成像 - 心血管成像
- 心声回声扫描 (Echocardiography) 是一种心声回声扫描.
- 医疗图像分析 医学图像分析
背景情况:
- 在心声回声图中自动边缘检测提供了客观的腔区域估计.
- 传统方法需要离线分析,限制实时功能评估.
- 一个新的系统可以在心声成像过程中实时自动检测边缘.
研究的目的:
- 为了比较手动跟踪的内心脏区域测量与传统的心声回声图.
- 评估用实时自动边缘检测系统获得的测量结果.
- 评估系统的准确性和可复制性在正常受试者身上.
主要方法:
- 用两个训练集来优化自动边缘检测的增强设置.
- 设置在使用中间增益的测试组中进行了评估.
- 计算了手动和实时测量的观察者间变异性.
主要成果:
- 实时和手动区域测量显示在优化设置中存在高相关性 (r=0.91-0.92).
- 增益设置影响了准确性,中间增益提供了平衡的结果.
- 手动 (9.5%) 和实时 (10.6%) 方法之间的观察者间变异性是可比的.
结论:
- 实时在线自动边缘检测准确地估计了手动绘制的腔区域.
- 系统的可重现性得到证实,尽管增益依赖.
- 这项技术有望在左心室功能评估中的临床应用.
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01:13Location and Orientation of the Heart
The human heart, despite its modest size and weight, is an organ of remarkable strength and endurance. Roughly the size of a fist, the heart weighs between 250 and 350 grams and is nestled within the mediastinum, the medial cavity of the thorax. It extends obliquely for about 12 to 14 cm, resting on the superior surface of the diaphragm. The heart is positioned anterior to the vertebral column and posterior to the sternum, with two-thirds of its mass lying to the left of the midsternal line.
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The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
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