Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Feb 2012
Review[EEG-fMRI studies on the neural networks of the generalized spike and wave discharges: an overview].
This paper generalizes the seizures characterized with paroxysmal generalized spike and wave discharges (GSWDs) in the EEG. Recent studies showed that GSWDs disrupt specific neural networks only rather than the entire brain homogenously. Simultaneous EEG and functional MRI (EEG-fMRDI) provides a high spatiotemporal resolution method for uncovering the regions of the brain showing changes in metabolism and blood flow during epileptic activity. ⋯ The sub-network associated with different behavioral deficits between interical and ictal GSWDs, and the different subtypes of generalized seizures will be further studied. The functional connectivity of the nodes of the neural network of GSWDs can also be further investigated. A better understanding of the neural network responsible for GSWDs generation may help to develop new therapeutic interventions.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Dec 2011
[Study on the haemostatic efficiency of composite bio-particles].
A porous composite particle (CP) was fabricated by the methods of emulsification and cross-link based on chitosan, alginate and collagen protein, and the tranexamic acid-loaded composite particles (TACP) was prepared by immersing the composite particle into the solution of tranexamic acid and by freeze drying. In the hepatic and splenic hemorrhage model of rabbits, CP and TACP were randomly used as haemostatic agents, and the Suxiaozhixuefen (Flashclot) was used as control. The corresponding hemostatic time and bleeding amount were observed respectively. ⋯ In the splenic bleeding model of rabbits, similar results were obtained with these three kinds of hemostatics. These results indicated that the CP based on chitosan, alginate and collagen protein displayed similar hemostatic efficiency to Flashclot. However, the TACP might be one of promising haemostatic powders due to its more excellent hemostatic efficiency.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Oct 2011
Review[Research progress on key technology of power and signal transmission in neuroprosthetic].
The power and signal transmission technology is one of the key technologies in neuroprosthetic research. This paper proposes firstly the related theory of power and signal transmission technology in neuroprosthetic, then summarizes the three key aspects of the power and signal transmission technology in neuroprosthetic. After analyzed the development of the inductive wireless power harvesting technology, the wireless telemetry technology and the wireless power harvesting telemetry technology, the emphasis on research contents will be proposed and discussed, which will help accelerate the further research of prosthetic.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Oct 2011
[Regularized inhomogeneity correction method for phased array image in magnetic resonance imaging].
Phased array coils (multiple receiver coil systems) have been extensively used for acquisition of MR images owing to their ability of increasing SNR, extending field-of-view (FOV), and reducing acquisition time. But the SOS algorithm,which is main method for phased array image reconstruction,will cause inhomogeneity in reconstructed image. ⋯ By using the reference scan, coil sensitivity map can be acquired, and image reconstructed from reference scan can be used as reference data in the regulation term. Experiments showed that the image uniformity was greatly improved by this method with scanning phantom and volunteer.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Aug 2011
[Development of an algorithm for wrist oscillometric blood pressure-measurement using singular value decomposition].
In order to eliminate the intrinsic noise due to special structure of the wrist, a new curve fitting algorithm based on singular value decomposition (SVD) was developed to increase the measurement accuracy. This algorithm could be subdivided into SVD and curve fitting algorithm (SCFA). SVD was used to extract the dominant component of oscillation waves at wrist. ⋯ To test the performance of SCFA, 45 subjects underwent the ABP measurement with different methods. The correlation coefficient between the pooled blood pressure measured by the auscultation and those by SCFA was 0.96. Comparison the results of SCFA with those of traditional curve fitting algorithm (TCFA), we found that the proposed SCFA could be used to reduce the partial intrinsic interference and efficiently improve the accuracy of the ABP at wrist.