相关实验视频

Updated: Jul 4, 2025

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

皮层骨的超声波衰减与生物力学,微观结构和组成特性相关

Saeed Jerban^1,2, Victor Barrere^3,4, Behnam Namiranian⁵

¹Department of Radiology, University of California, San Diego, 9500 Gilman Dr, La Jolla, CA, 92093, USA. sjerban@health.ucsd.edu.

European radiology experimental

|February 5, 2024

概括

超声波衰减与骨强度和组成有关. 这项研究将定量超声波 (QUS) 与骨联系起来.

科学领域:

生物物理学的生物物理.
材料科学材料科学材料科学
生物医学工程生物医学工程

背景情况:

定量超声波 (QUS) 参数,声速 (SoS) 和衰减系数 (α),通常用于评估骨特性.
了解QUS参数与骨组成 (包括水和大分子含量) 之间的关系,对于准确的骨健康评估至关重要.

研究的目的:

调查QUS参数 (SoS和α) 与牛皮层骨中的水和宏分子含量之间的关系.
通过微计算机断层扫描 (μCT) 和机械测试获得的骨矿物密度 (BMD),弹性模量 (E) 和微结构性质与QUS测量结果相关联.

主要方法:

通过5 MHz的定量超声波 (QUS) 分析了36个牛皮层骨条.
超短回声时间 (UTE) 磁共振成像 (MRI) 用于测量水 (总,结合,孔隙) 和宏分子质子密度和放松时间.
微计算机断层扫描 (μCT) 评估了骨矿物质密度 (BMD),多孔度和毛孔大小,而4点曲测试确定了弹性模量 (E).

主要成果:

超声衰减 (α) 与弹性模量 (E) 和骨矿物质密度 (BMD) 有显著的正相关性.
在α和多孔度,宏分子横向放松时间 (T2-MM) 和所有测量的骨水质子密度 (TWPD,BWPD,PWPD) 之间观察到显著的负相关性.
α与结合水质子密度 (BWPD) 的相关性比孔水质子密度 (PWPD) 强.

结论:

超声衰减 (α) 与骨的机械特性和组成密切相关,包括水和宏分子含量.
观察到的相关性表明,QUS测量,特别是衰减,可以反映骨内的原基质组织和水结构.
对QUS和骨部件的进一步研究可以导致更容易获得和负担得起的骨健康监测临床工具.

关键词:

骨力学骨力学骨力学骨力学皮层骨的皮层骨.这就是为什么MRI是MRI.定量超声波的使用方法超短回声时间超短回声时间

更多相关视频

Assessment of Bone Fracture Healing Using Micro-Computed Tomography

Assessment of Bone Fracture Healing Using Micro-Computed Tomography

Published on: December 9, 2022

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

Published on: June 12, 2020

相关概念视频

Ultrasonography

Ultrasonography

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.
During an ultrasonography procedure, a handheld device called...

Compact Bone

Compact Bone

Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...

Spongy Bone

Spongy Bone

All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...