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A variety of xenogeneic and allogeneic extracellular matrix (ECM) scaffolds have been promising in various tissue engineering applications, such as the porcine small intestinal submucosa. Yet no particular scaffolds have been optimal for vocal fold regeneration. The decellularized human umbilical vein (HUV) is a novel allogeneic scaffold that has shown some promise for cardiovascular tissue engineering...
Magnetic resonance imaging (MRI) is a widely used method to obtain high quality medical image of the brain. Post-processing MR images with segmentation algorithms enhances the visualization and measurement of soft tissues and lesions. However, the conventional algorithms are not perfect and there are still some regions which are not partitioned accurately. In this paper, a new ant colony algorithm...
Adipose tissue is derived from the embryonic mesenchyme and can be isolated easily. The purpose of this study was to investigate the multipotent ability of adipose-derived mesenchymal stem cells and to investigate the molecular characterization of adipose-derived mesenchymal stem cells during chondrogenic differentiation in vitro. Our results showed that adipose-derived mesenchymal stem cells have...
The aim of the study was to develop a procedure of purifying rabbit anti-rat TRβΔ polyclonal antibody from the antiserum. TRβΔ was a newly reported thyroid hormone receptor beta isoform. To gain better understanding of this new receptor, such as its tissue distribution, its specific antibody was needed. In this study, chemically synthesized peptide, which is uniquely existed in the TRβΔ, was used...
Use fresh Phaseolus vulgaris as raw materials, extracting Phaseolus vulgaris saponin by ultrasonic-ethanol method, determining the saponin content by vanillin- perchloric acid colorimetric method, the Saponin content in crude extract powder is 3.149%. Anatomised the stomach and intestine of effected mice after acute toxicity test of oral gavage mouse by Karber method, and observed epithelial tissue...
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...
In order to prevent the occurrence of complications after wisdom tooth extraction, using clinical research methods, choice of mandibular third molar patients in 65 cases, according to teeth were randomly divided into three groups. Removal of impacted teeth, the first group in the extraction fossa, placed oral tissue patch; the second group to place bone meal and oral tissue patch; third group was...
In a standard ultrasound imaging, the radio-frequency (RF) backscattered signals are decimated to get a medical image. The RF signal carries information about the scattering structure. Analysis of the RF signals may get useful clinical information for the tissue characterization. In this paper, the approach that is wavelet packets (WP) decomposition of I/Q ultrasound signals was proposed to gain the...
Phthalates are widely used in industry as solvents, additives and plasticizers. Some phthalates and their monoester metabolites are known to cause carcinogenic, toxic or endocrine-modulating effects. Chorion tissues as human early embryo are the base of organogenesis. Embryo (3-8 weeks) is sensitive period of teratogensis. With the development of industrialization, in addition to genetic factors,...
The explants (root tip, shoot tip, stem segments and leaf segments) from Phalaenopsis hybrid were used in this experiment. The effects of NAA, 6-BA, AC, CM and above explants on callus induction on KC medium were investigated by using orthogonal design (L16(54)). The results indicated that the optimum medium for callus induction is 6-BA 4.0 mg/L+ NAA 0.4 mg/+CM 100 ml/L+AC 0.4 mg/L, and stem segment...
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...
Automatically detecting the abnormality within cerebrospinal fluid space (CSF) from clinical non-enhanced computed tomography (NCT) images is significant since it can help diagnosis of many neurological diseases such as hydrocephalus and subarachnoid hemorrhage (SAH). However, extracting CSF space from NCT images is not easy, due to such factors as small size of CSF, partial volume effect due to large...
Accurate segmentation of magnetic resonance images according to tissue type is widely studded by many researcher, Recently Markov Random Field (MRF) has been used in this area. However the original MRF is supervised. So we introduce a novel approach called Dirichlet Markov Random Field for Magnetic Resonance Image (MRI) brain tissue classification. The approach uses Dirchilet Process Mixture (DPM)...
Ultrasonic tissue motion can be visualized in three steps: the gray scale motion detection, the Unsteady Flow Line Integral Convolution (UFLIC) algorithm to trace the velocity field, and display techniques for both the global motion and the local radial/tangential velocity components. Because of the large amount of data and high computational requirement in UFLIC, it was difficult to meet real-time...
This paper describes a new method developed for fusion of X-ray and fluorescent molecular tomography (FMT) images. For easier diagnostics, images obtained from X-ray and FMT sources are fused to generate perceptibly informative image display using the spatial and spectral domain properties of the images. The basic premise in this research originates from the fact that in medical imaging not all the...
Among the ligaments responsible in maintaining the structural integrity of knee joint, anterior cruciate ligament (ACL) injury is most commonly diagnosed. Recent advancement in clinical imaging technology has led to wide employment of magnetic resonance imaging (MRI) in such injury assessment. However, the visual assessment conducted with these images often requires the boundaries of selected structures...
The pathogenesis of collagen pathway on the metabolism disorder of bone and cartilage induced by chronic aluminum (Al) exposure was studied. One hundred Wistar rats were divided randomly into two groups. Experimental rats were given drinking water containing Al chloride (400 mg/L, Al3+), while control rats were given distilled water for up to 150 days. Ten rats were sacrificed in each group every...
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...
CCAAT/enhancer binding proteins (C/EBPs) comprise a family of transcription factors that are critical for normal cellular differentiation and function in a variety of tissues. They are not only involved in normal processes of physiological metabolism but also are related to the occurrence and development of many kinds of disorders. C/EBPs have multiple modes in which they act as activators or inhibitors...
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