An Optimized Method for the Limb Tremor Measurement

Limb tremor measurement is a prerequisite for quantitative assessment of some dyskinesia. It is important to early diagnosis and treatment of disease, such as Parkinson's disease. There are many measurement methods and assessment parameters used for tremors evaluation. The frequency, amplitude, acceleration and displacement of tremor movement are typical parameters. Through former researches, these quantitative methods are not precise enough for the tremor. It is hard to reflect the Multi-Degree-of-Freedom (MDOF) properties of limb tremor movement, and not easy to the identification and diagnosis of diseases. This paper presents a new quantitative method of limb tremor. Two Charge Coupled Devices (CCD) have been used to collect the moving images of the body tremor in real time. The tremor track has been reconstructed and tremor parameters have been calculated by an algorithm. These parameters are based on moving characteristics of MDOF. They can be used to evaluate the 3D spatial distribution characteristics, frequency characteristics and motion characteristics of the tremor, and also reflect the vector characteristics of the limb tremor.