Adaptive Fourier modeling for quantification of tremor
Adaptive Fourier modeling for quantification of tremor
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DOI：
10.1016/s0165-0270(97)02263-2
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发表时间：
1997-06-06
影响因子：
3
通讯作者：
Thakor, NV
中科院分区：
文献类型：
--
作者：
Riviere, CN;Reich, SG;Thakor, NV
提出了一种新的震颤量化计算方法，即加权频率傅里叶线性组合器（WFLC）。该技术通过根据梯度搜索方法调整滤波器权重来快速确定颤动的频率和幅度。它在测试过程中持续跟踪频率和幅度调制。通过量化随时间变化的特征，WFLC 有助于正确解释频谱分析的结果，特别是对于表现出多个频谱峰值的记录。因此，它补充了频谱分析，提供了比单独频谱分析更准确的震颤图像。该方法已被纳入桌面震颤测量系统中，以提供对使用数字化平板电脑书写和绘画期间记录的震颤进行临床有用的分析。模拟数据清楚地表明了对频率和幅度变化的跟踪。然后，临床记录显示了震颤随时间变化的量化的具体示例。 (C) 1997 Elsevier Science B.V.
A new computational method for quantification of tremor, the weighted frequency Fourier linear combiner (WFLC), is presented. This technique rapidly determines the frequency and amplitude of tremor by adjusting its filter weights according to a gradient search method. It provides continual tracking of frequency and amplitude modulations over the course of a test. By quantifying time-varying characteristics, the WFLC assists in correctly interpreting the results of spectral analysis, particularly for recordings exhibiting multiple spectral peaks. It therefore supplements spectral analysis, providing a more accurate picture of tremor than spectral analysis alone. The method has been incorporated into a desktop tremor measurement system to provide clinically useful analysis of tremor recorded during handwriting and drawing using a digitizing tablet. Simulated data clearly demonstrate tracking of variations in frequency and amplitude. Clinical recordings then show specific examples of quantification of time-varying aspects of tremor. (C) 1997 Elsevier Science B.V.