2025 , Vol. 22 >Issue 06: 564 - 571
DOI: https://doi.org/10.3877/cma.j.issn.1672-6448.2025.06.010
USCT声速反演成像定量评估肌肉脂肪含量的实验研究
通信作者:
崔立刚,Email:cuijuegang@126.comCopy editor: 汪荣
收稿日期: 2025-05-12
网络出版日期: 2025-08-01
基金资助
国家自然科学基金(12474461)
版权
Quantitative assessment of muscle fat content using ultrasound computed tomography-based speed-of-sound inversion imaging: an experimental study
Corresponding author:
Cui Ligang, Email: cuijuegang@126.comReceived date: 2025-05-12
Online published: 2025-08-01
Copyright
利用基于全波形反演(FWI)的超声计算机断层扫描(USCT)新型成像技术定量评估肌肉脂肪含量。
选取39例离体新鲜猪后腿模型,利用环形阵列USCT系统(512阵元,0.9 MHz)进行扫描,基于频域多尺度FWI算法重建高分辨率声速图像。在得到声速图像后,根据肌肉组织与脂肪组织之间的声速差异,对图像进行分析,计算脂肪面积百分比。以病理学分析(HE染色)测量的脂肪面积百分比为金标准进行对比验证。通过Pearson相关分析及组内相关系数(ICC)、Bland-Altman图分析评估USCT与病理结果的相关性与一致性。
USCT测量的肌肉脂肪含量为(17.79±8.97)%,病理测量结果为(19.90±9.42)%。相关性分析显示,USCT与病理肌肉内脂肪含量呈显著正相关(r =0.874,P<0.001)。一致性分析显示,USCT与病理结果的ICC为0.853(95%CI:0.704~0.925,P<0.05),Bland-Altman图显示,一致性界限(LOA)为-11.22%~6.99%。USCT与病理测量的肌肉内脂肪含量存在系统性偏差(平均差值=-2.11%)。去骨后USCT成像可清晰区分皮肤、脂肪与肌肉组织,显著提升定量精度。
本研究基于声速反演的USCT技术能够有效量化肌肉脂肪含量,为肌肉退行性病变的早期诊断提供非侵入性评估新途径,并为肌骨代谢性疾病的精准影像评估奠定了重要技术基础。
唐瑞 , 李盼盼 , 李玉冰 , 崔立刚 . USCT声速反演成像定量评估肌肉脂肪含量的实验研究[J]. 中华医学超声杂志(电子版), 2025 , 22(06) : 564 -571 . DOI: 10.3877/cma.j.issn.1672-6448.2025.06.010
To utilize a novel imaging technique employing ultrasound computed tomography (USCT) integrated with full waveform inversion (FWI) for the quantitative assessment of muscle fat content.
Thirty-nine ex-vivo fresh pig hindlimb models were scanned using a ring-array USCT system (512-element, 0.9 MHz). High-resolution acoustic velocity images were reconstructed using a frequency-domain multiscale FWI algorithm. Following sound speed image acquisition, fat area percentage was calculated based on the acoustic speed difference between muscle tissue and adipose tissue. Pathological analysis (hematoxylin-eosin [HE] staining) served as the gold standard for measuring fat area percentage for comparative validation. Correlation and agreement between USCT and pathological results were assessed using Pearson correlation analysis, intraclass correlation coefficient (ICC), and Bland-Altman plot analysis.
The muscle fat content measured by USCT was (17.79±8.97)%, while the pathological measurement result was (19.90±9.42)%. Correlation analysis revealed a significant positive correlation between USCT and pathological intramuscular fat content (r = 0.874, P<0.001). Agreement analysis showed an ICC of 0.853 (95% confidence interval: 0.704-0.925, P<0.05) between USCT and pathological results. The Bland-Altman plot indicated that the limits of agreement (LOA) ranging from -11.22% to 6.99%. There was a systematic bias between USCT and pathological measurements of intramuscular fat content (mean difference=-2.11%). Post-deboning USCT imaging clearly differentiated skin, fat, and muscle tissues, significantly enhancing quantitative accuracy.
This study demonstrates that USCT technology based on sound speed inversion can effectively quantify muscle fat content. It provides a novel non-invasive approach for the early diagnosis of muscle degenerative diseases and establishes a crucial technical foundation for the precise imaging assessment of musculoskeletal metabolic disorders.
唐瑞,李盼盼,李玉冰,等. USCT声速反演成像定量评估肌肉脂肪含量的实验研究[J/OL].中华医学超声杂志(电子版), 2025, 22(6): 564-571.
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