相位依赖性被动牵伸调节帕金森病B型超声分类
本研究为探索性研究，纳入28例帕金森病患者与18例年龄匹配对照，使用连续被动运动装置诱发踝关节旋转下的被动牵伸，同步采集腓肠肌B型超声视频与剪切波弹性成像。牵伸序列按弹性成像硬度进展分为初始、过渡、最终三相。仅以B型超声图像作为模型输入，按相位分别训练VGG19模型以区分帕金森病与对照。
要点
- 被动牵伸下帕金森病肌肉B型超声特征随张力增大更易与对照区分
- 最终高弹性相位分类准确率最高，提示阅片时关注牵伸末期肌肉回声特征
- 相位分辨外周肌肉成像可能作为帕金森病相关神经退行性变的补充标志物
核心结论
- 帕金森病肌肉在被动牵伸下表现出与健康对照的相位依赖性差异，且可被B型超声检测。
- B型超声分类准确率从初始相位的52%提升至最终相位的73%。
研究设计与样本
- 探索性研究，纳入28例帕金森病患者和18例年龄匹配对照。
- 使用连续被动运动装置进行踝关节旋转诱发被动牵伸，B型超声动态视频与剪切波弹性成像同步记录。
- 牵伸序列按剪切波弹性成像硬度进展标准化为初始、过渡、最终三相。
- 仅使用B型超声图像作为模型输入，每相分别训练VGG19模型以区分帕金森病与对照。
关键影像表现/征象
- 帕金森病相关肌肉B型超声特征在更高张力下更容易与健康对照区分。
诊断标准与关键数值
- 初始相位分类准确率为52%。
- 最终相位分类准确率为73%。
临床应用与阅片要点
- 被动牵伸下进行B型超声检查时，可重点关注牵伸末期即高弹性相位获取的肌肉回声特征。
- 肌肉B型超声联合被动牵伸有望作为帕金森病相关外周肌肉改变的补充评估方法。
局限性
- 研究为探索性设计，样本量较小。
以上解读依据论文摘要（全文未开放获取或许可不允许翻译转载）。
英文原文（摘要）· 点击展开
OBJECTIVE: Parkinson's disease (PD) is a progressive neurodegenerative disorder characterized by tremor, rigidity and bradykinesia. Although central nervous system pathology has been extensively studied, peripheral musculoskeletal manifestations in PD remain comparatively understudied.
METHODS: In this exploratory study, the characteristics of the gastrocnemius muscle were assessed using B-mode ultrasound in 28 PD patients and 18 age-matched controls. Dynamic B-mode ultrasound videos were acquired during passive stretching induced by ankle rotation using a continuous passive motion device, while shear wave elastography was recorded concurrently to quantify muscle stiffness. The stretching sequence was divided into three phases-initial (low elasticity), transitional (increasing elasticity) and final (high elasticity)-with phase boundaries standardized using the shear wave elastography-derived stiffness progression. For classification, only B-mode images were used as model input, and a VGG19 model was trained separately for each phase to discriminate PD from the controls.
RESULTS: Classification performance increased progressively across the phases, with accuracy improving from 52% in the initial phase to 73% in the final phase, indicating that PD-related muscle features become more discriminative under higher tension.
CONCLUSION: PD muscles exhibit phase-dependent differences from healthy controls that are detectable on B-mode ultrasound. These results support the potential of phase-resolved peripheral musculoskeletal imaging during passive stretching as a complementary biomarker for PD-related neurodegenerative processes.
引用
- Qiu, Zha, Lin, et al. Phase-Dependent Passive Muscle Stretching Modulates B-Mode Ultrasound Classification of Parkinson's Disease. Ultrasound Med Biol. 2026. PMID: 42236424. doi:10.1016/j.ultrasmedbio.2026.04.004
供执业医师工作参考，不替代临床判断；数值与分级以指南原文为准。