改进基于可变形分组注册的心肌应变估计,使用局部低级不相似度指标
Haiyang Chen1, Juan Gao1, Zhuo Chen1
1National Engineering Research Center of Advanced Magnetic Resonance Technologies for Diagnosis and Therapy, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
BMC medical imaging
|December 5, 2024
概括
一种新的Groupwise-LLR方法通过减少漂移效应来提高心血管磁共振特征跟踪 (CMR-FT) 的准确性. 这增强了心肌跟踪和应变估计,以更好地评估心脏功能.
科学领域:
- 心血管成像 - 心血管成像
- 医学物理 医学物理
- 生物医学工程 生物医学工程
背景情况:
- 主流的心血管磁共振特征跟踪 (CMR-FT) 方法由于累积的跟踪错误而遭受漂移.
- 现有的方法,如光流和双重注册,容易导致心肌跟踪和应变估计的不准确性.
研究的目的:
- 开发一种新型的CMR-FT方法,使用可变形的分组注册和局部低级别 (LLR) 不相似度指标.
- 为了提高心肌跟踪和应变估计在心血管磁共振成像中的准确性.
主要方法:
- 集群-LLR方法反复更新所有心脏阶段的位移场.
- 它最大限度地减少了变形的 cine 的 patchwise 信号列的总和.
- 根据光流,双向注册和其他使用模拟,公共和患者数据集的小组方法进行评估.
主要成果:
- 与替代方法相比,LLR在模拟数据上的跟踪和应变错误明显较低.
- 它实现了最小的轮跟踪错误,并减少了公共数据集上的漂移.
- 与患者数据中的放射性菌株的标记MRI相关性更好.
结论:
- 根据集团的LLR方法有效地减少了CMR-FT的漂移效应.
- 它提供了比现有技术更准确的心肌跟踪和应变估计.
- 这有助于改善对心脏功能的临床评估.
相关概念视频
Measurements of Strain
401
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
401
Transformation of Plane Strain
156
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
156


