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相关概念视频

Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

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When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
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Ultrasonography01:17

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
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Deformation in a Circular Shaft01:10

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One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
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Deformation of a Beam under Transverse Loading01:15

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Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
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Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
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DefCor-Net:物理意识的超声波变形校正

Zhongliang Jiang1, Yue Zhou1, Dongliang Cao2

  • 1Computer Aided Medical Procedures, Technical University of Munich, Munich, Germany.

Medical image analysis
|September 9, 2023
PubMed
概括
此摘要是机器生成的。

本研究介绍了DefCor-Net,这是一种用于纠正超声波图像变形的深度学习模型. 它通过估计组织硬度,显著提高了医学成像中的解剖学准确性.

关键词:
人工智能用于医学.具有解剖意识的超声波成像密集的移位场估计.感应力感应力 感应力感应力医疗图像分析 医学图像分析物理意识的超声波成像技术机器人超声波可以进行超声波.超声波成像中的刚度估计.超声波弹性成像 超声波弹性成像超声波图像分析分析超声波图像变形校正 超声波图像变形校正

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科学领域:

  • 医学成像医学成像
  • 生物医学工程 生物医学工程
  • 医疗保健中的人工智能

背景情况:

  • 超声波 (美国) 图像采集通常会导致形的解剖图像,从而挑战准确的诊断.
  • 准确的解剖学重建对于计算机辅助诊断系统至关重要.
  • 现有的方法在实时美国成像中难以准确地纠正变形.

研究的目的:

  • 介绍一个新的物理意识深度神经网络,DefCor-Net,用于超声波图像中准确的变形校正.
  • 通过结合生物医学知识和实时组织属性估计,使解剖意识的纠正成为可能.
  • 改进在变形的超声波图像中恢复原始几何形状.

主要方法:

  • 开发了一个粗到细的多尺度深度神经网络 (DefCor-Net) 用于变形校正.
  • 通过使用U形特征提取器在线估计像素智能的组织度,综合生物医学知识.
  • 使用多项式回归计算出变形场,基于测量到的探头力.

主要成果:

  • DefCor-Net显著提高了变形校正精度,将子系数从14.3±20.9提高到82.6±12.1 (在6N力下).
  • 该模型证明了从变形的超声波图像中有效地恢复原始解剖几何.
  • 验证是在志愿者的前臂和上臂的超声波图像上进行的.

结论:

  • 拟议的DefCor-Net提供了一种强大的,基于学习的方法,用于超声波成像中的解剖意识的变形校正.
  • 组织属性的实时估计可以提高几何准确性,这对于诊断一致性至关重要.
  • 这种方法有可能通过提高图像保真度来推进计算机辅助诊断.