Mitigation of Instrument-Dependent Variability in Ballistocardiogram Morphology: Case Study on Force Plate and Customized Weighing Scale

The objective of this study was to investigate.the measurement instrument-dependent variability in the.morphology of the ballistocardiogram (BCG) waveform in.human subjects and computational methods to mitigate the.variability. The BCG wasmeasured in 22 young healthy subjects.using a high-performance force plate and a customized.commercial weighing scale under upright standing posture..The timing and amplitude features associated with the major.I, J, K waves in the BCG waveforms were extracted and.quantitatively analyzed. The results indicated that 1) the I, J,.K waves associated with the weighing scale BCG exhibited.delay in the timings within the cardiac cycle relative to the.ECG R wave as well as attenuation in the absolute amplitudes.than the respective force plate counterparts, whereas.2) the time intervals between the I, J, Kwaves were comparable..Then, two alternative computationalmethods were conceived.in an attempt to mitigate the discrepancy between.force plate versus weighing-scale BCG: a transfer function.and an amplitude-phase correction. The results suggested.that both methods effectively mitigated the discrepancy in.the timings and amplitudes associated with the I, J, K waves.between the force plate and weighing-scale BCG. Hence,.signal processing may serve as a viable solution to the mitigation.of the instrument-induced morphological variability.in the BCG, thereby facilitating the standardized analysis.and interpretation of the timing and amplitude features in.the BCG across wide-ranging measurement platforms.

这项研究的目的是调查。符合术语的测量仪器依赖性变异性（BCG）波形在。人类受试者和计算方法中可降低。可验证性。 BCG在22名年轻的健康受试者中均予以衡量。使用高性能的力板和定制的。在直立的站立式姿势下进行的商业权衡标尺。提取并分析了BCG波形中与Major的时机和振幅特征。结果表明1）I，j，.k波与体重量表相关的BCG相关。在心脏周期内的时间与.ecg r波以及绝对振幅中的衰减相对于各自的力板板的衰减。试图减轻Force Plate与称重尺度BCG之间的差异：转移函数和振幅相校正。结果提出的结果。两种方法都有效地减轻了与I，J，K Waves相关的时机和振幅之间的差异。因此，信号处理可以作为缓解措施的可行解决方案。仪器引起的形态变异性。在BCG中，从而促进了标准化的分析。在广泛的测量平台跨BCG中对时间和振幅特征的解释。