AIM： To report the surgical result of pars plana vitrectomy（PPV） with air tamponade for rhegmatogenous retinal detachment（RRD） by ultra-widefield fundus imaging system. METHODS： Of 25 consecutive patients（25 e...AIM： To report the surgical result of pars plana vitrectomy（PPV） with air tamponade for rhegmatogenous retinal detachment（RRD） by ultra-widefield fundus imaging system. METHODS： Of 25 consecutive patients（25 eyes） with fresh primary RRD and causative retinal break and vitreous traction were presented. All the patients underwent PPV with air tamponade. Visual acuity（VA） was examined postoperatively and images were captured by ultrawidefield scanning laser ophthalmoscope system（Optos）. RESULTS： Initial reattachment was achieved in 25 cases（100%）. The air volume was 〉60% on the postoperative day（POD） 1. The ultra-widefield images showed that the retina was reattached in all air-filled eyes postoperatively. The retinal break and laser burns in the superior were detected in 22 of 25 eyes（88%）. A missed retinal hole was found under intravitreal air bubble in 1 case（4%）. The air volume was range from 40% to 60% on POD 3. A doublelayered image was seen in 25 of 25 eyes with intravitreal gas. Retinal breaks and laser burns around were seen in the intravitreal air. On POD 7, small bubble without effect was seen in 6 cases（24%） and bubble was completely disappeared in 4 cases（16%）. Small oval bubble in the superior area was observed in 15 cases（60%）. There were no missed and new retinal breaks and no retinal detachment in all cases on the POD 14 and 1 mo and last follow-up. Air disappeared completely on a mean of 9.84 d postoperatively. The mean final postoperative bestcorrected visual acuity（BCVA） was 0.35 log MAR. Mean final postoperative BCVA improved significantly relative to mean preoperative（P〈0.05）. Final VA of 0.3 log MAR or better was seen in 13 eyes. CONCLUSION： PPV with air tamponade is an effective management for fresh RRD with superior retinal breaks. The ultra-widefield fundus imaging can detect postoperative retinal breaks in air-filled eyes. It would be a useful facility for follow-up after PPV with air tamponade. Facedown position and acquired visual rehabilitation may be shorten.展开更多
平方公里阵列(Square Kilometre Array,SKA)射电望远镜的数据处理是通过管线方式进行的,管线的执行效率是SKA区域中心考虑的重要因素.连续谱成像观测是SKA的主要观测模式之一,也是许多科学工作的基础.本文以SKA低频先导设备(Murchison W...平方公里阵列(Square Kilometre Array,SKA)射电望远镜的数据处理是通过管线方式进行的,管线的执行效率是SKA区域中心考虑的重要因素.连续谱成像观测是SKA的主要观测模式之一,也是许多科学工作的基础.本文以SKA低频先导设备(Murchison Widefield Array,MWA)的成像管线为例,在中国SKA区域中心原型机(China SKA Regional Centre Prototype,CSRC-P)上进行并行处理管线优化.以往的优化方案都集中在少数性能热点,缺乏对整体管线的系统优化,导致整体加速比相对较低.针对这一问题,本文提出一种全局优化方案,针对管线使用多种编程语言和图像数据可独立处理的特点,综合使用C++多线程、Python多进程和Shell多任务并行等优化方法,并验证了优化结果的准确性.实验表明,优化后的代码在CSRC-P的x86节点和ARM(Advanced RISC Machine)节点上分别获得了2.7和2.4倍加速,运行时间分别从7479和9666 s,降低为2759和4061 s.ARM计算节点展现出对SKA应用良好的适应性.本文的优化策略和方法也适用于其他SKA科学应用,对SKA先导望远镜的科学运行和未来的运行也有帮助.展开更多
文摘AIM： To report the surgical result of pars plana vitrectomy（PPV） with air tamponade for rhegmatogenous retinal detachment（RRD） by ultra-widefield fundus imaging system. METHODS： Of 25 consecutive patients（25 eyes） with fresh primary RRD and causative retinal break and vitreous traction were presented. All the patients underwent PPV with air tamponade. Visual acuity（VA） was examined postoperatively and images were captured by ultrawidefield scanning laser ophthalmoscope system（Optos）. RESULTS： Initial reattachment was achieved in 25 cases（100%）. The air volume was 〉60% on the postoperative day（POD） 1. The ultra-widefield images showed that the retina was reattached in all air-filled eyes postoperatively. The retinal break and laser burns in the superior were detected in 22 of 25 eyes（88%）. A missed retinal hole was found under intravitreal air bubble in 1 case（4%）. The air volume was range from 40% to 60% on POD 3. A doublelayered image was seen in 25 of 25 eyes with intravitreal gas. Retinal breaks and laser burns around were seen in the intravitreal air. On POD 7, small bubble without effect was seen in 6 cases（24%） and bubble was completely disappeared in 4 cases（16%）. Small oval bubble in the superior area was observed in 15 cases（60%）. There were no missed and new retinal breaks and no retinal detachment in all cases on the POD 14 and 1 mo and last follow-up. Air disappeared completely on a mean of 9.84 d postoperatively. The mean final postoperative bestcorrected visual acuity（BCVA） was 0.35 log MAR. Mean final postoperative BCVA improved significantly relative to mean preoperative（P〈0.05）. Final VA of 0.3 log MAR or better was seen in 13 eyes. CONCLUSION： PPV with air tamponade is an effective management for fresh RRD with superior retinal breaks. The ultra-widefield fundus imaging can detect postoperative retinal breaks in air-filled eyes. It would be a useful facility for follow-up after PPV with air tamponade. Facedown position and acquired visual rehabilitation may be shorten.
文摘平方公里阵列(Square Kilometre Array,SKA)射电望远镜的数据处理是通过管线方式进行的,管线的执行效率是SKA区域中心考虑的重要因素.连续谱成像观测是SKA的主要观测模式之一,也是许多科学工作的基础.本文以SKA低频先导设备(Murchison Widefield Array,MWA)的成像管线为例,在中国SKA区域中心原型机(China SKA Regional Centre Prototype,CSRC-P)上进行并行处理管线优化.以往的优化方案都集中在少数性能热点,缺乏对整体管线的系统优化,导致整体加速比相对较低.针对这一问题,本文提出一种全局优化方案,针对管线使用多种编程语言和图像数据可独立处理的特点,综合使用C++多线程、Python多进程和Shell多任务并行等优化方法,并验证了优化结果的准确性.实验表明,优化后的代码在CSRC-P的x86节点和ARM(Advanced RISC Machine)节点上分别获得了2.7和2.4倍加速,运行时间分别从7479和9666 s,降低为2759和4061 s.ARM计算节点展现出对SKA应用良好的适应性.本文的优化策略和方法也适用于其他SKA科学应用,对SKA先导望远镜的科学运行和未来的运行也有帮助.
