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三维交互式虚拟植入在经导管主动脉瓣置换术术前评估中的应用一例
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作者 朱中凯 陈飞 +3 位作者 王民汉 周宇 冯沅 陈茂 《华西医学》 CAS 2023年第10期1607-1610,共4页
病例介绍患者,男,68岁,体重50 kg,身高160 cm,因“晕厥3年,气促乏力3个月”于2023年9月17日入院。3年前患者于活动时出现晕厥倒地,伴意识丧失,持续时间约5 s,醒后无肢体活动障碍,无大小便失禁,未重视未处理;3个月前患者出现反复气促、乏... 病例介绍患者,男,68岁,体重50 kg,身高160 cm,因“晕厥3年,气促乏力3个月”于2023年9月17日入院。3年前患者于活动时出现晕厥倒地,伴意识丧失,持续时间约5 s,醒后无肢体活动障碍,无大小便失禁,未重视未处理;3个月前患者出现反复气促、乏力,双下肢水肿,于外院就诊诊断为“主动脉瓣狭窄(重度)”。既往史:10年前行“腰椎间盘突出射频消融术”,否认高血压、糖尿病病史,否认过敏史,无烟酒嗜好。 展开更多
关键词 经导管主动脉瓣置换术 影像评估 环上结构 三维交互式模拟
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Crustal and upper mantle structure and the deep seismogenic environment in the source regions of the Lushan earthquake and the Wenchuan earthquake 被引量:38
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作者 ZHENG Yong GE Can +3 位作者 XIE ZuJun YANG YingJie XIONG Xiong HSU HouTze 《Science China Earth Sciences》 SCIE EI CAS 2013年第7期1158-1168,共11页
Following the M w 7.9 Wenchuan earthquake, the M w 6.6 Lushan earthquake is another devastating earthquake that struck the Longmenshan Fault Zone (LFZ) and caused severe damages. In this study, we collected continuous... Following the M w 7.9 Wenchuan earthquake, the M w 6.6 Lushan earthquake is another devastating earthquake that struck the Longmenshan Fault Zone (LFZ) and caused severe damages. In this study, we collected continuous broadband ambient noise seismic data and earthquake event data from Chinese provincial digital seismic network, and then utilized ambient noise tomography method and receiver function method to obtain high resolution shear wave velocity structure, crustal thickness, and Poisson ratio in the earthquake source region and its surroundings. Based on the tomography images and the receiver function results, we further analyzed the deep seismogenic environment of the LFZ and its neighborhood. We reveal three main findings: (1) There is big contrast of the shear wave velocities across the LFZ. (2) Both the Lushan earthquake and the Wenchuan earthquake occurred in the regions where crustal shear wave velocity and crustal thickness change dramatically. The rupture faults and the aftershock zones are also concentrated in the areas where the lateral gradients of crustal seismic wave speed and crustal thickness change significantly, and the focal depths of the earthquakes are concentrated in the transitional depths where shear wave velocities change dramatically from laterally uniform to laterally non-uniform. (3) The Wenchuan earthquake and its aftershocks occurred in low Poisson ratio region, while the Lushan earthquake sequences are located in high Poisson ratio zone. We proposed that the effect of the dramatic lateral variation of shear wave velocity, and the gravity potential energy differences caused by the big contrast in the topography and the crustal thickness across the LFZ may constitute the seismogenic environment for the strong earthquakes in the LFZ, and the Poisson ratio difference between the rocks in the south and north segments of the Longmenshan Fault zone may explain the 5 years delay of the occurrence of the Lushan earthquake than the Wenchuan earthquake. 展开更多
关键词 Lushan earthquake Wenchuan earthquake receiver function ambient noise tomography deep seismogenic environ-ment
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