| Stroke is a common disease in the elderly, which has a mortality rate and high morbidity characteristics. Paralysis and other complications often occur in patients after illness, who often bear enormous pressure from the physical and economic aspects. Therefore clinical assessment for patients with motor dysfunction has a great significance in guiding the development of rehabilitation programs for patients. Currently, clinical assessment and treatment methods have some limitations. The main approach for evaluating the rehabilitation of patient is scoring and classification based on the motor function scale. However, this method is based on subjective ratings, and is highly depent on the experience of the examiner. It may occur that different diagnoses of the same patient come to different conclusions. Besides the clinical assessment methods, the clinical therapy methods also have some drawbacks. The therapeutic scheme is often planned subjectively and many options are dependent on the doctor’s experience. Therefore, it is difficult to achieve optimal individualized treatment.Ultrasound imaging technology is a commonly used technique for the study of muscle contraction characteristics in vivo, it can clearly reflect the deep muscle morphology with wide detection range. However, most of the studies focused the static measurement muscle structures by ultrasound imaging before and after treatment Although a few studies have used ultrasound imaging to measure dynamic muscle contraction, they were limited to normal subjects and the study of stroke patients has not been reported. In this paper, an innovative method of ultrasound imaging is proposed for assessment of the motor dysfunction in hemiplegic patients, and for the assessment of the therapeutic effect of acupuncture therapy. It is expected to explore a new method for clinical assessment and treatment of movement disorders program through the work of this thesis. The main work of this paper consists of three parts.(1) Developed a multi-channel motion signal acquisition system, the system realizes real-time display, synchronous signal acquisition and storage for the surface EMG, ultrasound imaging and joint angles signals(2) In the Nanshan Hospital Rehabilitation Division, walking experiments were taken for twenty stroke patients with lower extremity hemiplegia. The ultrasound images, surface electromyography, and ankle angle signal were acquisitioned simultaneously from the gastrocnemius muscle. All the signals were analyzed offline to fine the differences between the muscles of affected side and unaffected side.(3) In the Nanshan Hospital Rehabilitation Division, The experiment for assessing the effect of acupuncture therapy was taken for three stroke patients with lower extremity hemiplegia. Real-time ultrasound images were captured from subjects’ tibialis anterior muscle in acupuncture treatment, and the speed of muscle contraction were calculated over time by image processing algorithms.The results of walking experiment show that subjects’ muscles morphology of affected side and unaffected side have significant differences in the course of the campaign. The results of acupuncture treatment experiment show subjects’ muscle contraction velocity change evidently during the treatment, it can provide an objective evaluation method for the choose of stimulus intensity, stimulation time and other treatment parameters. In summary, the study confirms that ultrasound imaging technology can analyze motor dysfunction in patients with hemiplegia, and evaluate the effect of acupuncture therapy. It has important implications for doctor to understand the rehabilitation of the patient’s and guide the development of their rehabilitation program. |
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