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Angiogenesis, the formation of de novo blood vessels, has been implicated in many human diseases, including cancer, diabetes, and in recent years, neurodegenerative diseases. Study of the formation of microvasculature, therefore, has important implications in diagnosis and treatment of diseases. This paper describes how we combine a CPU-based Cellular Potts model of sprouting angiogenesis in three...
In order to economize the labor time and increase the accuracy of dental restoration, an automated CAM system for NC tool path planning and generation is developed in this work. Compared with traditional methods, the proposed automated CAM system brings in a novel algorithm for model machining boundary extraction, an algorithm for multi-model path planning and an algorithm for tool path generation...
A fast algorithm is proposed to choose the optimal port-combination for the next generation non-phased array coil. This kind of coil is so promising and scalable that it would mimic any known phased array coil at the cost of a combinatorial optimization problem. The raw data of signal and noise are respectively collected using a Siemens Trio 3T scanner according to the Kellman-McVeigh method. The...
Hyperspectral imaging technology has been applied in histology and cytology for a long time. Image quality and spectra are usually affected by light source, optics and sensors in hyperspectral imaging systems. This paper proposes a continuum removal algorithm and radiometric correction preprocessing method to eliminate these influences. The algorithm removes the continuum of image after the spectra...
In case of the presence of metallic implants in patients, image quality in computed tomography (CT) often suffers from severe artifacts which may cause the image to be non-diagnostic. Traditional sinogram interpolation based metal artifact reduction (MAR) algorithms replace metal-corrupted projection data (the metal trace) via various interpolation strategies. However, while these methods can effectively...
The brain tissue conductivity not only plays key role in the analysis of electroencephalography (EEG) and magnetoencephalography (MEG), but also is one key factor of diagnosing brain functional change in time. Diffusion tensor imaging (DTI) is a non-invasive imaging method, with high spatial-resolution. The importance of conductivity imaging of brain inner tissue is remarkable. This paper summarized...
Magnetic induction tomography (MIT) is a non-invasive and non-contact medical imaging technology. It is a visualized implementation based on image reconstruction algorithms, which plays an important role in determining the image quality. In this paper, an improved back-projection algorithm based on magnetic field lines is presented and can be described as follows. Firstly, the phase data collected...
Neurovascular coupling (NVC) is one of the essential mechanisms in brain activities. Both cerebral blood flow (CBF) and electrocorticography (ECoG) have been serving as the most important indicators of neurovascular coupling in system level. In this study, we developed an integrated device to realize laser speckle contrast imaging (LSCI) and ECoG recording simultaneously in rat's brain. Using this...
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...
Near-infrared spectroscopy (NIRS) is a state-of-the-art non-invasive modality that measures changes in hemoglobin concentrations during tasks. More and more researches tried using NIRS as signal acquisition tool for brain-computer interface (BCI). In this paper, we conducted a study to test the feasibility of using single channel fNIRS in the building of a BCI system and whether it is possible to...
Most of the ultrasound elasticity imaging techniques can't improve the resolution and penetration at the same time. Coded excitation has displayed the capability to improve the penetration by transmitting coded waves and decoding the RF echoes. But the effectiveness of this technique in ultrasound elastographic imaging methods has not been fully demonstrated. This paper introduces a phase modulation...
As a powerful tool for imaging blood flow, laser speckle contrast imaging (LSCI) has been already applied in clinical diagnosis and pre-clinical researches. In LSCI, the contrast image provides the two-dimensional blood flow distribution information with penetration depth less than 500 μm. Over the past decade, spatial, temporal and spatiotemporal methods had been developed to obtain contrast image...
Hexavalent chromium Cr(VI) has been widely used in metal pickling and plating, which induces cancer and coetaneous allergy in the long time exposure. In this work, a novel thin film composite hollow fiber nanofiltration (NF) membrane was developed, which was optimized by time of interfacial polymerization, concentration of monomers and the IP process. In addition, operational conditions, including...
Multi-modality thyroid ultrasound image can provide more information about the lesion for the physician to diagnosis. In this paper, the thyroid B-mode ultrasound image and the elastogrom are viewed as a bag. And the local features of the B-mode image and the global features of the elastogram are considered as instances of the bag. Multiple-instance learning (MIL) method is employed to solve thyroid...
Motion prediction algorithms are often used in dynamic magnetic resonance imaging to improve the compressed sensing based reconstruction. Previously, the difference calculation (DC) between the current frame (to be reconstructed) and the estimated frame was used as sparse residual signals. In order to obtain sparser signal, an improved Motion Estimation (ME) and Motion Compensation (MC) method was...
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...
Cone-beam dental computerized tomography has been introduced as a system geared towards maxillofacial imaging, which is gradually becoming a common tool within the dental industry. Segmentation of teeth from dental CT data is vital for a variety of computer-aided procedures such as dental implants, orthodontic planning and cosmetic surgeries. Teeth segmentations near soft tissue structures can help...
In this paper, the micro-structure of the Shangjuxu acupuncture point or tissue where there were no acupoints in the fractional rabbit hind limb were studied by in-line phase contrast CT imaging (IL-XPCI-CT) methods based on synchrotron radiation. Then the imaging results are reconstructed in three-dimensional limit, and the 3D images for different tissues are compared. The experiments were performed...
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