Delayed gastric emptying(DGE) is a frequent complication after pylorus-preserving pancreatoduodenectomy(PpPD).Kawai and colleagues proposed pylorus-resecting pancreatoduodenectomy(PrPD) with antecolic gastrojejunal an...Delayed gastric emptying(DGE) is a frequent complication after pylorus-preserving pancreatoduodenectomy(PpPD).Kawai and colleagues proposed pylorus-resecting pancreatoduodenectomy(PrPD) with antecolic gastrojejunal anastomosis to obviate DGE occurring after PpPD.Here we debate the reported differences in the prevalence of DGE in antecolic and retrocolic gastro/duodeno-jejunostomies after PrPD and PpPD,respectively.We concluded that the route of the gastro/duodeno-jejunal anastomosis with respect to the transverse colon;i.e.,antecolic route or retrocolic route,is not responsible for the differences in prevalence of DGE after pancreatoduodenectomy(PD) and that the impact of the reconstructive method on DGE is related mostly to the angulation or torsion of the gastro/duodeno-jejunostomy.We report a prevalence of 8.9% grade A DGE and 1.1% grade C DGE in a series of 89 subtotal stomach-preserving PDs with Roux-en Y retrocolic reconstruction with anastomosis of the isolated Roux limb to the stomach and single Roux limb to both the pancreatic stump and hepatic duct.Retrocolic anastomosis of the isolated first jejunal loop to the gastric remnant allows outflow of the gastric contents by gravity through a "straight route".展开更多
为了改进图像恢复效果,减少运行时间,提出了一种基于改进的多层小波分解压缩感知图像的处理方法。该方法利用小波变换对图像进行多层分解,根据小波域高频系数分布特点通过高斯矩阵随机观测,利用正交匹配追踪算法（OMP）恢复高频系数,最...为了改进图像恢复效果,减少运行时间,提出了一种基于改进的多层小波分解压缩感知图像的处理方法。该方法利用小波变换对图像进行多层分解,根据小波域高频系数分布特点通过高斯矩阵随机观测,利用正交匹配追踪算法（OMP）恢复高频系数,最后通过小波逆变换重构图像。实验结果表明,本文的算法优于传统算法,峰值信噪比（PSNR）平均提高了4~6 d B,运行时间缩短了1~2个量级,为物联网、无线传输技术提供了更好的可能性。展开更多
Human acellular nerve allografts have a wide range of donor origin and can effectively avoid nerve injury in the donor area. Very little is known about one-stage reconstruction of digital nerve defects. The present st...Human acellular nerve allografts have a wide range of donor origin and can effectively avoid nerve injury in the donor area. Very little is known about one-stage reconstruction of digital nerve defects. The present study observed the feasibility and effectiveness of human acellular nerve allograft in the reconstruction of 〈 5-cm digital nerve defects within 6 hours after injury. A total of 15 cases of nerve injury, combined with nerve defects in 18 digits from the Department of Emergency were enrolled in this study. After dehridement, digital nerves were reconstructed using human acellular nerve allografts. The patients were followed up for 6-24 months after reconstruction. Mackinnon-Dellon static two-point discrimination results showed excellent and good rates of 89%. Semmes-Weinstein monofilament test demonstrated that light touch was normal, with an obvious improvement rate of 78%. These findings confirmed that human acellular nerve allograft for one-stage reconstruction of digital nerve defect after hand injury is feasible, which provides a novel trend for peripheral nerve reconstruction.展开更多
A gamma-ray Computed Tomography （CT）technique based on MATLAB has been developed,and its potential for the application of multiphase flow detection has been demonstrated with simulation results.Aiming to improve the...A gamma-ray Computed Tomography （CT）technique based on MATLAB has been developed,and its potential for the application of multiphase flow detection has been demonstrated with simulation results.Aiming to improve the real time performance,we design a CT system with fixed sources and limited detecors.By dissecting the imaging region with Delaunay triangulation method,the algebraic reconstruction algorithm and simultaneous multiplicative algebraic reconstruction algorithm re implemented respective algebraic reconstruction algorithm are implemented respectively to reconstruct cross-sectional images.The resultant images can be utilized to identify flow regimes or extract characteristic parameters.展开更多
文摘Delayed gastric emptying(DGE) is a frequent complication after pylorus-preserving pancreatoduodenectomy(PpPD).Kawai and colleagues proposed pylorus-resecting pancreatoduodenectomy(PrPD) with antecolic gastrojejunal anastomosis to obviate DGE occurring after PpPD.Here we debate the reported differences in the prevalence of DGE in antecolic and retrocolic gastro/duodeno-jejunostomies after PrPD and PpPD,respectively.We concluded that the route of the gastro/duodeno-jejunal anastomosis with respect to the transverse colon;i.e.,antecolic route or retrocolic route,is not responsible for the differences in prevalence of DGE after pancreatoduodenectomy(PD) and that the impact of the reconstructive method on DGE is related mostly to the angulation or torsion of the gastro/duodeno-jejunostomy.We report a prevalence of 8.9% grade A DGE and 1.1% grade C DGE in a series of 89 subtotal stomach-preserving PDs with Roux-en Y retrocolic reconstruction with anastomosis of the isolated Roux limb to the stomach and single Roux limb to both the pancreatic stump and hepatic duct.Retrocolic anastomosis of the isolated first jejunal loop to the gastric remnant allows outflow of the gastric contents by gravity through a "straight route".
文摘为了改进图像恢复效果,减少运行时间,提出了一种基于改进的多层小波分解压缩感知图像的处理方法。该方法利用小波变换对图像进行多层分解,根据小波域高频系数分布特点通过高斯矩阵随机观测,利用正交匹配追踪算法（OMP）恢复高频系数,最后通过小波逆变换重构图像。实验结果表明,本文的算法优于传统算法,峰值信噪比（PSNR）平均提高了4~6 d B,运行时间缩短了1~2个量级,为物联网、无线传输技术提供了更好的可能性。
基金supported by grants from the National Program on Key Basic Research Project of China(973 Program),No.2014CB542200
文摘Human acellular nerve allografts have a wide range of donor origin and can effectively avoid nerve injury in the donor area. Very little is known about one-stage reconstruction of digital nerve defects. The present study observed the feasibility and effectiveness of human acellular nerve allograft in the reconstruction of 〈 5-cm digital nerve defects within 6 hours after injury. A total of 15 cases of nerve injury, combined with nerve defects in 18 digits from the Department of Emergency were enrolled in this study. After dehridement, digital nerves were reconstructed using human acellular nerve allografts. The patients were followed up for 6-24 months after reconstruction. Mackinnon-Dellon static two-point discrimination results showed excellent and good rates of 89%. Semmes-Weinstein monofilament test demonstrated that light touch was normal, with an obvious improvement rate of 78%. These findings confirmed that human acellular nerve allograft for one-stage reconstruction of digital nerve defect after hand injury is feasible, which provides a novel trend for peripheral nerve reconstruction.
基金supported by National Natural Science Foundation of China(No.60820106002,50937005,60532020)
文摘A gamma-ray Computed Tomography （CT）technique based on MATLAB has been developed,and its potential for the application of multiphase flow detection has been demonstrated with simulation results.Aiming to improve the real time performance,we design a CT system with fixed sources and limited detecors.By dissecting the imaging region with Delaunay triangulation method,the algebraic reconstruction algorithm and simultaneous multiplicative algebraic reconstruction algorithm re implemented respective algebraic reconstruction algorithm are implemented respectively to reconstruct cross-sectional images.The resultant images can be utilized to identify flow regimes or extract characteristic parameters.
