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相关概念视频

Regional Terms01:12

Regional Terms

9.7K
Regional terms describe anatomy by dividing the body parts into different regions that contain structures involved in contributing similar functions. Using these terms helps increase the accurate description and identification of the particular region of interest or region affected by the disease.
Primarily, the human body has two major regions, the axial and appendicular regions. The axial region comprises regions from the head to the abdomen and makes up the central body axis. In contrast,...
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Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

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The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
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Centroid of a Body01:16

Centroid of a Body

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The centroid is an important concept in engineering, physics, and mechanics. It is the geometric center of a body. It always lies within the body except in cases with holes or cavities. When the material that a body is composed of is uniform or homogeneous, the centroid coincides with its center of mass or the center of gravity.
For a homogeneous body with constant density, the centroid can usually be found using equations representing a balance of the moments of the body's volume. If the...
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Body Water Content and Fluid Compartments01:19

Body Water Content and Fluid Compartments

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Life's biochemical processes occur within aqueous solutions. Solutes are substances that are dissolved within these solutions. The human body contains a variety of solutes, which can differ across various body parts. These can encompass proteins—such as those responsible for clotting and carbohydrate transport—as well as electrolytes. In medicine, an electrolyte is often described as a mineral ion derived from a salt possessing an electric charge. Examples include sodium ions...
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Axial and Appendicular Muscles01:18

Axial and Appendicular Muscles

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Skeletal muscles, the key players in our body's movement, can be classified into two groups based on their location and function: axial muscles and appendicular muscles. These classifications reflect the primary roles the muscles play in the body's structure and movement.
Axial Muscles
Axial muscles, situated along the body's midline, are intricately connected to the axial skeleton, which includes the skull, spine, ribs, and sternum. These muscles facilitate facial expressions and...
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相关实验视频

Updated: Jul 23, 2025

Author Spotlight: Advancements in 3D Optical Imaging for Comprehensive Body Composition Assessment in Modern Research
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3D 身体形状用于区域和附录的身体组成估计.

Yijiang Zheng1, Zhuoxin Long2, Xiaoke Zhang2

  • 1Dept. of Computer Science, The George Washington University, 800 22 St NW, Washington, DC, USA 20052.

Proceedings of SPIE--the International Society for Optical Engineering
|July 17, 2023
PubMed
概括

这项研究引入了一种新的方法,使用3D身体形状来预测身体组成,包括瘦身质量和尾骨肌肉质量 (ASMM). 这种方法为当前的身体成分评估技术提供了更容易获得和更准确的替代方案.

关键词:
3D身体形状 3D身体形状身体组成 身体构成DXA DXA 是一个机器学习 机器学习医学成像医学成像回归是一种回归.

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科学领域:

  • 生物医学工程 生物医学工程
  • 人类测量学 人类测量学.
  • 辐射科学 辐射科学

背景情况:

  • 身体组成对于评估骨矿物质密度,肌肉强度和身体表现至关重要,影响了像肉症这样的诊断.
  • 目前的身体成分测量方法往往不准确或依赖于昂贵的设备,如双能X射线吸收计 (DXA).
  • DXA测量的是瘦肉质量,而不是肌肉质量,四肢瘦肉质量以前被用作尾骨肌肉质量 (ASMM) 的近似值.

研究的目的:

  • 开发一种新的形状描述器,用于从3D形状的身体中预测区域性身体组成,特别是瘦体质.
  • 提出一个神经网络模型来评估ASMM使用瘦质量预测.
  • 评估这些方法的有效性与传统的人类测量和回归模型相比.

主要方法:

  • 开发一种新的形状描述器来分析3D身体形状以进行构成预测.
  • 实现神经网络模型,整合形状和人口特征,用于ASMM评估.
  • 使用调整R平方值和根平均平方误差 (RMSE) 进行模型性能比较的评估.

主要成果:

  • 使用水平周长为特征的回归模型优于区域人类测量测量,平均RMSE降低约21%.
  • 建议用于ASMM评估的神经网络实现了最低的RMSE1.85公斤,超过了传统的回归模型.
  • 与标准线性回归模型相比,神经网络方法将RMSE提高了17%.

结论:

  • 3D身体形状分析显示了预测全身和区域瘦肉质的巨大潜力.
  • 开发的方法为身体成分评估提供了一个有希望的,可能更容易获得的替代方案.
  • 该研究强调了3D形状描述器和神经网络在估计ASMM和区域瘦质量方面的实用性.