在测量前部中心边缘角度时使用水平参考线比传统方法更可靠
Roland Howard1, Benjamin Miltenberg1, William L Johns1
1Rothman Orthopaedic Institute, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.
Orthopaedic journal of sports medicine
|August 11, 2025
概括
一种新的测量技术在部成像中提高了前部中心边缘角度 (ACEA) 的可重现性. 这种新的方法为评估关节异常,如发育不良和冲刺等,提供了更好的一致性.
科学领域:
- 放射学 放射学是一门学科.
- 整形外科手术 整形外科手术
- 医学成像分析 医学成像分析
背景情况:
- 前部中心边缘角 (ACEA) 对于评估部异常前部骨覆盖率至关重要.
- 传统的ACEA测量对患者定位和成像技术高度敏感,影响可靠性.
研究的目的:
- 评估一种新的测量技术,使用水平参考线和股骨头圆圈来改进ACEA的确定.
- 评估这种新方法在控制骨盆斜率和测量ACEA方面的可重现性.
主要方法:
- 三位作者对21名患者的虚假形状放射图进行了回顾性审查.
- 传统的ACEA测量与一种新的方法进行比较,该方法涉及水平参考线和最适合的股骨头圆圈.
- 使用配对的t-测试和类内相关系数 (ICC) 进行统计分析,以确定 interrater 和 intrarater 的可靠性.
主要成果:
- 这种新方法表现出强大的内可靠性 (ICC = 0.805-0.966) 和内可靠性 (ICC = 0.831-0.902).
- 传统方法显示,三位评审中有两位评审者之间的可靠性较弱 (ICC = 0.420,0.585).
- 两种方法之间的ACEA平均值没有显著差异 (P = .36).
结论:
- 与传统方法相比,新型测量技术为ACEA评估提供了更好的可重复性.
- 这种标准化的方法被推用于未来的研究,关节发育不良和骨支柱入.
- 这些发现支持采用这种技术,以便更一致地对部覆盖面进行放射性评估.
更多相关视频
相关概念视频
Adjusting a Traverse
102
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
102
Beams with Unsymmetric Loadings
168
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...
168
Influence of Earth's Curvature and Atmospheric Refraction on Leveling
272
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
272
Design Example: Measuring Distance Between Two Points with Obstructions
119
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
119
Horizontal Curve: Problem Solving
116
A horizontal curve is characterized by its radius, intersection angle, and stationing of key points. In this case, the radius is 400 meters, and the angle of intersection is 30 degrees, with the station of the point of curvature (P.C.) at 0 + 150 meters. The goal is to determine the station values at the point of intersection (P.I.), point of tangency (P.T.), and midpoint of the curve, as well as the length of the long chord.The process begins with calculating the tangent distance (T) and the...
116
Meridians
512
In surveying, meridians are vital reference lines to measure directions and establish accurate land orientations. Meridians run from the north to the south poles, providing a stable framework for angular measurements and mapping. Meridians are fundamental in survey design, with the primary types being astronomic, magnetic, and assumed meridians. Each type offers distinct benefits and limitations, selected based on the project's scale and precision needs.The astronomic meridian is aligned with...
512


