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The modeling of needle insertion into tissues is important for simulation of this procedure and for robotic technologies applied to percutaneous therapy. In this article, we present a first attempt to develop a general force model for the needle insertion throw different tissue layers (skin, fat and muscle) to reach an internal organ (the liver, for instance) with objectives of control, looking for...
L-ascorbic acid and sodium carboxymethylcellulose were taken as raw material to synthesize polymer material L-ascorbic acid cellulose ester which had antioxidation effect. Antioxidation effect of o benzylgalloyl microcrystalline cellulose ester was appraised in vitro. The results showed that all the different concentrations L-ascorbic acid cellulose ester significantly improved GSH-Px activity of...
This paper mainly studies the anti-fatigue function and the mechanism of Epimedium flavones. The changes of the relative laboratory parameters in exercise fatigue were observed and the mechanism of resisting exercise fatigue of Epimedium flavones was discussed by using loaded swimming experiment of mice. The main contents are as follows: (1) Studying the effects of Epimedium flavones on the body weight...
The protein synthesised from the C/EBPβ gene interacts specifically with a C/EBP-recognition sequence and acts as a transcriptional activator. It plays a key role in lipometabolism and therefore is considered as a candidate gene for goose fat liver forming. In order to get the sequence, four pairs specificity primers were designed for amplification of C/EBPβ gene in Landes geese. The fragments of...
Elastography is an emerging ultrasonic imaging technique; it has a broad clinical application for tissue parameter estimation. We designed a real-time system to measure tissue stiffness information non-invasively based on transient elastography. The system performance mainly depends on the circuit design before the Analog-to-Digital Converter (A/D), especially the preamplifier part which is very sensitive...
Microwave (MW) ablation is a minimally invasive therapeutic strategy for the local treatment of solid malignancies that has received much attention over the past few years. It is very important to detect and evaluate lesions generated by MW during treatment procedures. This study describes one new ultrasonic imaging technique to characterize lesions based on estimation of relative changes in tissue...
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