通过准线性粘弹性束模型增强可导向导管的尖端定位
1School of Mechanical Engineering, Pusan National University, room M117 building 303, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, South Korea.
概括
一种新的准线性粘弹性 (QLV) 束模型提高了微创手术中可导向导管的精度. 这种先进的模型解释了依赖时间的行为,大大减少了尖端定位错误.
科学领域:
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
- 机器人技术 机器人技术 机器人技术
背景情况:
- 可导向的导管对于微创手术至关重要,但其精确的尖端定位仍然是一个挑战.
- 现有的模型往往过于简化了导管的行为,导致导航和干预的不准确性.
- 精确的导管机制建模对于改善手术结果和患者安全至关重要.
研究的目的:
- 引入和验证准线性粘弹性 (QLV) 束模型,以提高可转向导管的尖端定位精度.
- 研究时间依赖和非线性材料特性对导管曲行为的影响.
- 将QLV模型的性能与传统的弹性和线性粘弹性模型进行比较.
主要方法:
- 模拟可引导导管作为一个细分的QLV光束,具有不同的刚度.
- 导出动力学方程以根据段曲率确定尖端位置.
- 进行应力放松测试以确定QLV材料参数.
- 在随机变形下通过性能测试验证模型的准确性.
主要成果:
- 与弹性和线性粘弹性模型相比,QLV光束模型在预测导管尖端位置方面表现出更高的准确性.
- 与弹性模型相比,QLV模型在平均尖端位置误差方面实现了80.6%的改善.
- 在将QLV模型与线性粘弹性模型进行比较时,观察到平均尖端位置误差的30.9%改善.
结论:
- 结合时间依赖和非线性行为对于准确建模可转向导管曲至关重要.
- 开发的QLV模型显著提高了尖端定位精度,为外科导航提供了更可靠的工具.
- 这项研究强调了先进的粘弹性建模的潜力,以提高医疗器械的性能和安全性.
更多相关视频
05:04Author Spotlight: Evaluating Clinicians' Adoption of Ultrasound-Guided Vascular Cannulation Through Simulation Training
Published on: August 9, 2024
1.1K
06:18Intravascular Ultrasound Image-Based Finite Element Modeling Approach for Quantifying In Vivo Mechanical Properties of Human Coronary Artery
Published on: December 6, 2024
705
相关概念视频
01:23Equation of the Elastic Curve
698
The concept of curvature in plane curves, crucial in structural engineering, defines how sharply a beam bends under load. This curvature is determined using the curve's first and second derivatives.
Consider a cantilever beam with a point load at its free end (for instance, a diving board). When analyzing beam deflection with small slopes, the shape of the beam's elastic curve becomes key. The governing equation for this analysis involves the bending moment and the beam's flexural...
Consider a cantilever beam with a point load at its free end (for instance, a diving board). When analyzing beam deflection with small slopes, the shape of the beam's elastic curve becomes key. The governing equation for this analysis involves the bending moment and the beam's flexural...
698
01:15Beams with Symmetric Loadings
249
The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...
The M/EI...
249
01:15Deformation of a Beam under Transverse Loading
433
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...
The insights from the bending moment diagram extend to...
433
01:17Beams with Unsymmetric Loadings
170
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
170
01:16Elastic Curve from the Load Distribution
262
The structural behavior of beams under distributed loads is critical for engineering analysis, which focuses on predicting how beams bend and react under such conditions. Different types of beams (e.g., cantilever, supported, or overhanging) behave differently under distributed load conditions.
For all beams, the analysis of the beam's reaction to distributed loads begins by understanding the relationship between a beam's load and the resulting shear forces and bending moments.
For all beams, the analysis of the beam's reaction to distributed loads begins by understanding the relationship between a beam's load and the resulting shear forces and bending moments.
262
01:14Castigliano's Theorem: Problem Solving
775
The deflection of a simply supported beam that carries a central point load can be analyzed using structural mechanics principles, particularly by applying Castigliano's theorem. This theorem relates the displacement at the load application point to the partial derivatives of the strain energy in the structure. The simply supported beam with a point load at its center has symmetric reaction forces at the supports, each bearing half of the load. The bending moment at any point along the beam...
775