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Acetabular components with or without screws in total hip arthroplasty

World Journal of Orthopedics 2017年第9期8卷 705-709页

作者： Murad Pepe Onur Kocadal tamer erener Kubilay Ceritoglu Ertugrul Aksahin Cem Nuri Aktekin Department of Orthopedics and Traumatology Ankara Training and Research Hospital Orthopedics and Traumatology MedicalPark Hospital

AIM To compare the operation time, blood loss, and early outcomes of acetabular components with and without the *** Thirty patients who underwent cementless acetabular component with or without screw and whose follow-up exceeded one year period in total hip arthroplasty were evaluated. A posterior approach was used in all surgical procedures by one experienced surgeon. Demographic data, operation time, intra-and postoperative blood loss volume, follow-up clinical score, cup migration, and osteolysis were recorded. The Kolmogorov-Smirnov test was performed for testing the normality of study data. Mann-Whitney U test was used to analyze the intergroup differences. A P-value of ≤ 0.05 was considered statistically *** Acetabular components were used in 16(53.3%) patients with screw and 14(46.7%) without screw. After one year of follow-up, an osteolytic lesion of 3 mm was found in only one patient in the screw group. No cup migrationwas encountered. Intra-group mean Harris hip score significantly increased, but there was no significant intergroup difference. While the mean operation time of the screw group was 121.8 min(range; 95-140), it was 102.7 min(range; 80-120) in the no-screw group, and this difference was statistically significant(P = 0.002). The mean intraoperative/postoperative, and total blood loss were 556.6 mL(range: 350-800)/423.3 mL(range: 250-600), and 983.3 mL(range: 600-1350), respectively in the screw group; and 527 mL(range: 400-700)/456 mL(range: 230-600), and 983 mL(range: 630-1250), respectively in the no-screw group. The blood loss difference between the two groups was not significant. In the screw group, the operation time was 19.1 min longer than the no-screw group, and this difference was statistically *** Acetabular components with or without screw have similar results, but the use of screw increases the operation time significantly, while not changing the blood loss volume.

关键词： Hip arthroplasty Acetabular fixation With screw Without screw Operation time

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Evaluation of Terra SAR-X Optic Image Fusion Performance for Image Classification in a Complex Urban Environment

Evaluation of Terra SAR-X Optic Image Fusion Performance for...

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2012 4th International Conference on Environmental Science and Information Application Technology(ESIAT 2012)

作者： Arzu erener Gülcan Sarp Sebnem Düzgün Department of Geomatics Engineering Selcuk University Department of Geological Engineering Suleyman Demirel University Department of Mining Engineering & Geodetic and Geographic Information Technologies Middle East Technical University

The main objective of this study includes to evaluate the SAR and optic image fusion performance for image classification in a complex urban environment. The Terra SAR-X (TS-X) SAR image and Quickbird optical data is used as the classifier inputs for land cover/use classification. Initially, multispectral imagery and high-resolution PAN imagery of Quickbird data were fused. After removing the SAR speckle from the SAR image it was fused by the pan sharpened optic image. Both pan sharpened optic image and fused SAR image were classified using the same training set in order to remove the uncertainty caused by training location. The urban environment selected for performance test of proposed approach involves buildings with various shapes and surface materials and some buildings may appear indistinguishable from roads and pavements. Due to this complexity in the region each building type is classified into different classes and then aggregated into one class. Each land cover/use classes are then evaluated by an error matrix for both classification result. The classification result of fused SAR image slightly changes from classification result of pan sharpened optic image for complex urban environment, and it performs well for all types of urban classes.

关键词： Terra SAR-X (TS-X), Fusion, Classification.

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