Filters








19 Hits in 14.2 sec

Validation of a statistical shape model-based 2D/3D reconstruction method for determination of cup orientation after THA

G. Zheng, J. von Recum, L.-P. Nolte, P. A. Grützner, S. D. Steppacher, J. Franke
2011 International Journal of Computer Assisted Radiology and Surgery  
Purpose The aim of this study was to validate the accuracy and reproducibility of a statistical shape model-based 2D/3D reconstruction method for determining cup orientation after total hip arthroplasty  ...  Conclusions Our validation results demonstrate that the statistical shape model-based 2D/3D reconstruction-based method is an accurate, consistent, and reproducible technique to measure cup orientation  ...  Conflict of interest None.  ... 
doi:10.1007/s11548-011-0644-7 pmid:21792672 fatcat:nt3tbh35nzc4rph5dec46wozua

Statistically Deformable 2D/3D Registration for Estimating Post-operative Cup Orientation from a Single Standard AP X-ray Radiograph

Guoyan Zheng
2010 Annals of Biomedical Engineering  
CT-based 2D/3D rigid image registration methods have been developed to measure post-operative cup orientation.  ...  To address this limitation, this article proposes a statistically deformable 2D/3D registration approach for estimating post-operative cup orientation.  ...  ACKNOWLEDGMENTS The author gratefully acknowledges the financial support from the Swiss National Centers of Competence in Research CO-ME.  ... 
doi:10.1007/s10439-010-0060-0 pmid:20556516 fatcat:3rdpjns3rrerpk2zfhwmpvo2oq

Assessing the Accuracy Factors in the Determination of Postoperative Acetabular Cup Orientation Using Hybrid 2D–3D Registration

Guoyan Zheng
2009 Journal of digital imaging  
The hybrid 2D-3D registration scheme is an accurate and robust method to measure exact cup orientation in THA.  ...  To assess the potential factors that may affect the accuracy and robustness of the hybrid 2D-3D registration scheme in determining the postoperative acetabular cup orientation, a comprehensive validation  ...  Moritz Tannast for their help in the experimental setup and to the anonymous reviewers for their constructive comments which helped improve the original manuscript.  ... 
doi:10.1007/s10278-009-9226-4 pmid:19626370 pmcid:PMC3046689 fatcat:r6elyetwjrb25hyky2jnizce6a

Computer assisted determination of acetabular cup orientation using 2D–3D image registration

Guoyan Zheng, Xuan Zhang
2010 International Journal of Computer Assisted Radiology and Surgery  
2D-3D image-based registration methods have been developed to measure acetabular cup orientation after total hip arthroplasty (THA).  ...  Methods A new formulation for determination of postoperative cup orientation, which couples a radiographic measurement with 2D-3D image matching, was developed.  ...  Moritz Tannast for their help in experimental setup. The authors would like to thank the anonymous reviewers for their constructive comments and suggestions.  ... 
doi:10.1007/s11548-010-0407-x pmid:20180034 fatcat:syt6l42o7fbjhnlsd5w7mn6ury

A Survey on Statistical Modeling and Machine Learning Approaches to Computer Assisted Medical Intervention: Intraoperative Anatomy Modeling and Optimization of Interventional Procedures

Ken'ichi MOROOKA, Masahiko NAKAMOTO, Yoshinobu SATO
2013 IEICE transactions on information and systems  
Ken'ichi MOROOKA †a) , Member, Masahiko NAKAMOTO † †b) , Nonmember, and Yoshinobu SATO † †c) , Member SUMMARY This paper reviews methods for computer assisted medical intervention using statistical models  ...  Furthermore, the articles are reviewed which addressed the used of statistical models for optimization of interventions. Finally, we conclude the survey by describing the future perspective.  ...  Acknowledgments The authors of this paper are partly supported by MEXT Grant-in-Aid for Scientific Research on Innovative Areas "Computational Anatomy for Computer-aided Diagnosis and Therapy: Frontiers  ... 
doi:10.1587/transinf.e96.d.784 fatcat:htwaxowr5ba3pptr3pxztjto5y

Three-dimensional morphological analysis of true acetabulum in Crowe type IV hip dysplasia via standard-sized cup-simulated implantation

Yuhui Yang, Yuanchen Ma, Qingtian Li, Bofu Lin, Hang Dong, Qiujian Zheng
2021 Quantitative Imaging in Medicine and Surgery  
The aim of the present study was to investigate the anatomical size, orientation angles, and 2/3-dimensional (2D/3D) coverage parameters of the true acetabulum in Crowe IV hips; evaluate the feasibility  ...  Acetabular reconstruction in Crowe type IV developmental dysplasia of the hip (DDH) can be a challenging procedure for surgeons.  ...  Using a 3D implantation simulation method, the aim of the present study was to investigate the anatomical size, orientation angles, and 2-dimensional (2D)/3D coverage parameters of the true acetabulum  ... 
doi:10.21037/qims-21-803 pmid:35502392 pmcid:PMC9014161 fatcat:2o3c4c3qvzhoxdgz5x6klgubba

Cup implantation accuracy using the HipCOMPASS mechanical intraoperative support device

Ken Suda, Tomoyuki Ito, Dai Miyasaka, Norio Imai, Izumi Minato, Naoto Endo
2016 SpringerPlus  
Methods: We measured cup orientation in 97 THA cases with HipCOMPASS and in 80 cases without it.  ...  Therefore, to elevate the appeal of such systems, we have developed HipCOMPASS, a simple and effective mechanical angle indicator for use in supine THA.  ...  Acknowledgements We would like to thank the staff in the operating room of Niigata University Medical and Dental Hospital for their contribution to this study.  ... 
doi:10.1186/s40064-016-2503-z pmid:27386270 pmcid:PMC4912536 fatcat:zleqms2ufbfypbdthfxpds7dtu

Computer assisted determination of acetabular cup orientation using 2D-3D image registration

G Zheng, X Zhang
2010
2D-3D image-based registration methods have been developed to measure acetabular cup orientation after total hip arthroplasty (THA).  ...  Methods A new formulation for determination of postoperative cup orientation, which couples a radiographic measurement with 2D-3D image matching, was developed.  ...  Moritz Tannast for their help in experimental setup. The authors would like to thank the anonymous reviewers for their constructive comments and suggestions.  ... 
doi:10.7892/boris.620 fatcat:n22lt3yhbvckppd2y6jfbbs4oq

Supplementum 244: swiss orthopaedics - abstracts of the 80th annual meeting

2020 Swiss Medical Weekly  
Finally, the real importance of the EHL -DMCNGT distance relies in the fact that it is a simple measurement that can be done intra-operatively and takes into account the three dimensions of the deformity  ...  In order to avoid damage to the DMCNGT, we were able to estimate a danger zone ranging from 12mm to 19mm medial from the center of the EHL tendon, at the MTPJ's level.  ...  FM93 A novel method for 2D/3D registration between non-weightbearing 3D CT-reconstructed models and weight-bearing plain radiographs for preoperative planning in lower limb realignment surgery ( Introduction  ... 
doi:10.4414/smw.2020.20350 pmid:32794157 fatcat:yjiqvj6i4fhtnjowzphilbuyp4

Supplementum 236: swiss orthopaedics, 79th annual meeting

2019 Swiss Medical Weekly  
Using Statistical Shape Modeling.  ...  The orientations of the partial anterior, posterior and the mean acetabular plane were assessed in anatomic terms. Additionally, the TAL-based recommended cup orientation has been determined.  ...  detail P058 Determining factors for sports participation 2 to 3.5 years after anterior cruciate ligament reconstruction Dr.  ... 
doi:10.4414/smw.2019.20438 fatcat:fruhdz3hwre5td4osxvycvey5a

Supplementum 229: swiss orthopaedics, 78th annual meeting

2018 Swiss Medical Weekly  
A comparison of acromial shape, acromial roof orientation and antero-posterior glenoid coverage was performed in a multiplane reconstruction analysis of CT scans. Results: 1.)  ...  Methods: THA was virtually performed on 3D models built from preoperative CT scans of 15 patients undergoing THA. The acetabular center of rotation and leg length was reconstructed anatomically.  ...  Study Design & Methods: Fundamental Cartilage tissue engineering to isolate/identify chondrocyte-derived progenitor cells (2D/3D cultures).  ... 
doi:10.4414/smw.2018.20431 fatcat:4i5n7e7y3fafpjxutee7qoxsga

Augmented Reality: Mapping Methods and Tools for Enhancing the Human Role in Healthcare HMI

Chiara Innocente, Luca Ulrich, Sandro Moos, Enrico Vezzetti
2022 Applied Sciences  
Methods: Studies published from January 2018 to December 2021 were analyzed after a comprehensive search on PubMed, Google Scholar, Scopus, IEEE Xplore, Science Direct, and Wiley Online Library databases  ...  In this perspective, the literature on orthopedic surgery techniques based on AR was evaluated, focusing on identifying the limitations and challenges of AR-based healthcare applications, to support the  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app12094295 fatcat:sy4gbg3k2bedzppvsn3bm7ydyq

Extended Oral Antibiotic Prophylaxis in High-Risk Patients Substantially Reduces Primary Total Hip and Knee Arthroplasty 90-Day Infection Rate

Avinash Inabathula, Julian E. Dilley, Mary Ziemba-Davis, Lucian C. Warth, Khalid A. Azzam, Philip H. Ireland, R. Michael Meneghini
2018 Journal of Bone and Joint Surgery. American volume  
Assessment of Elbow Torque in Youth and Adolescent Baseball Pitchers: Fastballs vs. METHODS: We reviewed 167 primary THAs performed by a single surgeon over 14 months.  ...  Allograft and surgical advancements have influenced a modest percentage of surgeons. Functional limitations and failure of physical therapy are the most frequent reasons for pursuing reconstruction.  ...  A threshold-based selection method was then used to select variables that individually accounted for ≥0.10 of full-model risk prediction.  ... 
doi:10.2106/jbjs.17.01485 fatcat:2sfka3hjgfadjbcybn6rbmmn2a

In-Depth Oral Presentations and Oral Communications

2013 Journal of Orthopaedics and Traumatology  
Materials and methods We conducted a retrospective study on 160 consecutive patients (44 men and 116 women) (range 60 to 103 years) surgically treated for hip fractures in 2012.  ...  For each patient, we analyzed the presence of co-morbidities, risk factors and blood levels of vitamin D.  ...  Materials and methods Twenty-two patients with a mean age of 52 years were considered. Preoperatively, X-ray and CT-scan with 2D-3D reconstructions were performed.  ... 
doi:10.1007/s10195-013-0258-7 fatcat:lcczrwombba5lhtrtbaq4gtsyy

Component Placement in Hip and Knee Replacement Surgery: Device Development, Imaging and Biomechanics [article]

Mohsen Akbari Shandiz, University Of Calgary, University Of Calgary, Carolyn Anglin
2015
An ex vivo study demonstrated the accuracy and feasibility of the device for guiding orientation and depth of the acetabular cup.  ...  Patellofemoral and femoral analyses showed that the knee shape and geometry changed in numerous significant ways as a result of the TKA.  ...  A 3D pelvis model is reconstructed from an AP radiograph using a novel articulated statistical shape and intensity model-based (ASSIM) 2D/3D reconstruction method (Ehlke et al., 2014).  ... 
doi:10.11575/prism/25385 fatcat:rs5v5vuqmjepbj5b7kivtnuzrq
« Previous Showing results 1 — 15 out of 19 results