Learning to assess the quality of stroke rehabilitation exercises

Min Hun Lee, D. Siewiorek, A. Smailagic, A. Bernardino, S. Badia
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引用次数: 43

Abstract

Due to the limited number of therapists, task-oriented exercises are often prescribed for post-stroke survivors as in-home rehabilitation. During in-home rehabilitation, a patient may become unmotivated or confused to comply prescriptions without the feedback of a therapist. To address this challenge, this paper proposes an automated method that can achieve not only qualitative, but also quantitative assessment of stroke rehabilitation exercises. Specifically, we explored a threshold model that utilizes the outputs of binary classifiers to quantify the correctness of a movements into a performance score. We collected movements of 11 healthy subjects and 15 post-stroke survivors using a Kinect sensor and ground truth scores from primary and secondary therapists. The proposed method achieves the following agreement with the primary therapist: 0.8436, 0.8264, and 0.7976 F1-scores on three task-oriented exercises. Experimental results show that our approach performs equally well or better than multi-class classification, regression, or the evaluation of the secondary therapist. Furthermore, we found a strong correlation (R2 = 0.95) between the sum of computed exercise scores and the Fugl-Meyer Assessment scores, clinically validated motor impairment index of post-stroke survivors. Our results demonstrate a feasibility of automatically assessing stroke rehabilitation exercises with the decent agreement levels and clinical relevance.
学会评估卒中康复训练的质量
由于治疗师的数量有限,任务导向的练习通常被规定为中风后幸存者的家庭康复。在家庭康复期间,如果没有治疗师的反馈,患者可能会变得没有动力或困惑地遵守处方。为了解决这一挑战,本文提出了一种自动化方法,可以实现脑卒中康复训练的定性和定量评估。具体来说,我们探索了一个阈值模型,该模型利用二元分类器的输出将动作的正确性量化为性能分数。我们使用Kinect传感器收集了11名健康受试者和15名中风后幸存者的运动数据,并从初级和二级治疗师那里获得了真实得分。提出的方法与主要治疗师达成了以下共识:在三个任务导向练习中f1得分分别为0.8436、0.8264和0.7976。实验结果表明,我们的方法与多类别分类、回归或二级治疗师的评估一样好,甚至更好。此外,我们发现计算的运动得分和Fugl-Meyer评估得分之间有很强的相关性(R2 = 0.95), Fugl-Meyer评估得分是中风后幸存者的临床验证的运动损伤指数。我们的结果证明了自动评估卒中康复练习的可行性与体面的协议水平和临床相关性。
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