目的探讨全髋关节置换术(total hip arthroplasty,THA)治疗成年双侧髋关节发育不良(developmental dysplasia of the hip,DDH)的短期临床疗效。方法回顾性分析自2012年8月至2016年8月在解放军南京总医院收治的36例双侧DDH的患者,男4例,...目的探讨全髋关节置换术(total hip arthroplasty,THA)治疗成年双侧髋关节发育不良(developmental dysplasia of the hip,DDH)的短期临床疗效。方法回顾性分析自2012年8月至2016年8月在解放军南京总医院收治的36例双侧DDH的患者,男4例,女32例;年龄29~67岁,平均52.1岁。其中16例患者行一期双侧THA术,另外20例患者行二期THA术。通过病案检索和术后随访评估两组患者的手术时间、住院周期、双侧下肢长度差异以及髋关节Harris评分。结果所有患者均获得随访,时间18~54个月。一期手术患者住院周期为(11.0±3.3)d,明显短于分期手术的(19.8±5.4)d(t=-0.4,P<0.05);两种手术方案的手术时间、术后双下肢长度差异与Harris评分并无明显差异。末次随访时所有患者与术前相比双侧下肢长度差异明显下降(F=8.87,P=0.009)、Harris评分明显提高(F=0.02,P=0.006)。结论THA治疗双侧DDH患者临床效果满意,依据患者情况可选择一期THA术或者二期THA术,两种手术方案对术后髋关节功能恢复并无明显差异。展开更多
This article proposes a relay camera videometrics based method to convert an unstable measuring platform to a static reference to solve the problems of large error or invalidation caused by measuring platform instabil...This article proposes a relay camera videometrics based method to convert an unstable measuring platform to a static reference to solve the problems of large error or invalidation caused by measuring platform instability in photogrammetric and videometric measurements.The method installs a relay camera on the unstable platform and captures images of a reference marker fixed on a static reference or vice versa to resolve the 3D movement of the unstable platform relative to the static reference,based on which it corrects the error of the measured results and thus eliminating the influence of the platform movement.It finds new and important applications for videometrics by making high-precision dynamic measurement possible on unstable platforms.Verification experiments and numerical simulations have proven its validity and practicability.展开更多
This article intends to solve the matching problem of 2C level lunar images by Chang’E-1(CE-1)lunar probe satellite.A line-scanner image matching method is proposed which represents deformation by the quadric functio...This article intends to solve the matching problem of 2C level lunar images by Chang’E-1(CE-1)lunar probe satellite.A line-scanner image matching method is proposed which represents deformation by the quadric function along the camera motion direction and bases on the deformation model for a relief terrain’s imaging on sensors of the satellite borne three-line scanner camera.A precise matching is carried out for the normal view,the frontward view,and the backward view images of the CE-1 by combining the proposed method with the standard correlation method.A super-resolution(SR)reconstruction algorithm based on the wavelet interpolation of non-uniformly sampled data is also adopted to realize SR reconstruction of CE-1 lunar images,which adds the recognizable targets and explores CE-1 lunar images to the full.展开更多
文摘目的探讨全髋关节置换术(total hip arthroplasty,THA)治疗成年双侧髋关节发育不良(developmental dysplasia of the hip,DDH)的短期临床疗效。方法回顾性分析自2012年8月至2016年8月在解放军南京总医院收治的36例双侧DDH的患者,男4例,女32例;年龄29~67岁,平均52.1岁。其中16例患者行一期双侧THA术,另外20例患者行二期THA术。通过病案检索和术后随访评估两组患者的手术时间、住院周期、双侧下肢长度差异以及髋关节Harris评分。结果所有患者均获得随访,时间18~54个月。一期手术患者住院周期为(11.0±3.3)d,明显短于分期手术的(19.8±5.4)d(t=-0.4,P<0.05);两种手术方案的手术时间、术后双下肢长度差异与Harris评分并无明显差异。末次随访时所有患者与术前相比双侧下肢长度差异明显下降(F=8.87,P=0.009)、Harris评分明显提高(F=0.02,P=0.006)。结论THA治疗双侧DDH患者临床效果满意,依据患者情况可选择一期THA术或者二期THA术,两种手术方案对术后髋关节功能恢复并无明显差异。
基金supported by the National Natural Science Foundation of China (Grant Nos.11072263,10727202)
文摘This article proposes a relay camera videometrics based method to convert an unstable measuring platform to a static reference to solve the problems of large error or invalidation caused by measuring platform instability in photogrammetric and videometric measurements.The method installs a relay camera on the unstable platform and captures images of a reference marker fixed on a static reference or vice versa to resolve the 3D movement of the unstable platform relative to the static reference,based on which it corrects the error of the measured results and thus eliminating the influence of the platform movement.It finds new and important applications for videometrics by making high-precision dynamic measurement possible on unstable platforms.Verification experiments and numerical simulations have proven its validity and practicability.
基金Supported by the"Eleventh five"Obligatory Budget of People’s Liberation Army(PLA)(Grant No.513150801)
文摘This article intends to solve the matching problem of 2C level lunar images by Chang’E-1(CE-1)lunar probe satellite.A line-scanner image matching method is proposed which represents deformation by the quadric function along the camera motion direction and bases on the deformation model for a relief terrain’s imaging on sensors of the satellite borne three-line scanner camera.A precise matching is carried out for the normal view,the frontward view,and the backward view images of the CE-1 by combining the proposed method with the standard correlation method.A super-resolution(SR)reconstruction algorithm based on the wavelet interpolation of non-uniformly sampled data is also adopted to realize SR reconstruction of CE-1 lunar images,which adds the recognizable targets and explores CE-1 lunar images to the full.
