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The requirements of acoustic output parameters in clinical instruments are very strict. This paper proposed a method that introducing the Golay complementary coded excitation and decoded compression to ophthalmological ultrasound biometer, instead of the traditional one using one pulse excitation. By adopting this method, the excitation voltage can be cut down from 60 V to ±15 V. Thus, the ultrasonic...
Cough can be defined as a forced expulsive onrush, normally against a closed glottis, producing a characteristic sound. It can be an indicator of many respiratory diseases, and its counting and classification is an important aspect. We propose a method on internal sound signal to automatically identify, count and (partly) qualify cough sounds. Our approach relies on explosive phase detection, because...
The inverse problem of Magnetoacoustic Tomography (MAT) is often ill-posed in the sense that noise in the data may give rise to significant errors in the process of reconstruction. It is critical and significant to develop a feasible and effective method to deal with this ill-posed problem. In this paper, we introduce a regularization method combining Tikhonov filter function, unbiased predictive...
Compared with conventional therapy techniques, sonodynamic therapy of atherosclerosis can achieve non-invasive radical treatment. Currently the treatment parameters are mostly determined empirically. This paper is to describe the establishment of ultrasonic propagation simulation model of atherosclerotic biological tissues by identifying and extracting the medical image feature, together with the...
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