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Elastography is an emerging ultrasonic imaging technique. A system based on transient elastography is built to measure biological tissues' stiffness in the paper. Then, wavelet de-noising of the displacement estimatation to reduce artifacts due to high overlap in transient elastography is presented. High overlap between data segments is essential to improve axial resolution in transient elastography...
Abstract-Elastography is a non-invasive method in which stiffness of soft tissue is displayed as strain images to assist in detecting or classifying tumors. External tissue compression causes axial displacements which are subsequently computed and converted to strain. However, in this processing, periodic artifacts often corrupt the image quality severely. This paper presents a 2-D FFT removal algorithm...
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...
Articular cartilage is a thin but crucial tissue layer which plays an important role in diarthrodial joints. During the last decade, the quantitative ultrasound technique, especially the high frequency ultrasound elasticity measurement technique, called as ultrasound elastomicroscopy (UEM), has been widely employed as a versatile modality to investigate the articular cartilage. Ultrasound elastomicroscopy...
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...
Though cartilage tissue is susceptible to damage and difficult to self-repair, cartilage tissue engineering provides an ideal way for the treatment of cartilage defects. Mechanical environments have significant effects on the growth and development of cartilage. The research of mechanical states of repaired articular cartilage by tissue engineering has significantly clinical value. According to the...
Cartilage degradation or defects cause joint pain, activity obstacles, or even completely losing the joint function. At present, using many new technologies and methods for treatment clinically, but it only relieves the patients of pain. The development of cartilage tissue engineering is becoming an ideal way of permanently repairing tissue defects. Mechanical factors play a major role during the...
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...
Tissue-mimicking phantoms are essential for the investigation of ultrasonic elastography. A modified polyacrylamide gel based tissue-mimicking phantom is developed in this paper. It shows greater stability than phantom based on physical gel, such as gelatin and agar. The elastic and echographic properties of this phantom are determined by the concentration of acrylamide and graphite powder respectively...
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