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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...
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...
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...
Propose: Idiopathic orbital inflammatory pseudotumors (IOIP) are inflammatory pseudotumors (IPT) of unknown etiology that develop in the orbit. Due to the lack of well-defined pathogenic mechanisms and diagnostic markers, diagnosis and treatment of this disease remain a significant challenge. Therefore, the aims of this study are to define the etiological factors of IOIP and to identify potential...
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...
In Optical Coherence Tomography (OCT) technology, as contrast mechanism and a characterization of the optical polarization properties of a biological tissue, it is very important of polarization in which birefringence is one of the relative phenomena. We analyzed the propagation of polarized light in a linearly birefringent turbid medium and simulated the degree of polarization of diffusely backscattered...
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...
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...
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...
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...
To study the effect of different number of diffusion gradient directions (NDGD) of diffusion tensor imaging (DTI) on dispersion degree of fractional anisotropy (FA) values and its signal noise ratio (SNR) for adult brain tissues. Eight health volunteers were imaged by a 1.5T magnetic resonance scanner with different NDGD (6, 9, 12, 15, 20, 25, and 30 noncollinear) respectively, and seven FA maps associated...
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...
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...
In view of the inherent speckle noise in medical ultrasound images, a novel method is proposed based on the blind deconvolution and the Maximum-Likelihood (ML) filtering. Firstly, the point spread function (PSF) is blindly estimated based on the complex-cepstrum filtering; then the PSF is input into a Wiener Filter in order to recover the tissue reflectivity. Secondly, the reflectivity is reasonably...
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