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


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Article Info

DATE

2011-07-27

AUTHORS

G. Zheng, J. von Recum, L.-P. Nolte, P. A. Grützner, S. D. Steppacher, J. Franke

ABSTRACT

PurposeThe 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. With a statistical shape model, this method allows reconstructing a patient-specific 3D-model of the pelvis from a standard AP X-ray radiograph. Cup orientation (inclination and anteversion) is then calculated with respect to the anterior pelvic plane that is derived from the reconstructed model.Materials and methodsThe validation study was conducted retrospectively on datasets of 29 patients (31 hips). Among them, there were 15 men (15 hips) and 14 women (16 hips). The average age of the patients was 69.4±8.5 (49−82) years. Each dataset has one postoperative X-ray radiograph and one postoperative CT scan. The postoperative CT scan for each patient was used to establish the ground truth for the cup orientation. The cup anteversion and inclination that were calculated from the 2D/3D reconstruction method were compared to the associated ground truth. To validate reproducibility and reliability, two observers performed measurements for each dataset twice in order to measure the reproducibility and the reliability of the 2D/3D reconstruction method.ResultsOur validation study demonstrated a mean accuracy of 0.4 ± 1.8° (−2.6° to 3.3°) for inclination and a mean accuracy of 0.6±1.5° (−2.0° to 3.9°) for anteversion. Through the Bland-Altman analysis, no systematic errors in accuracy were detected. The method showed very good consistency for both parameters.ConclusionsOur 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 from postoperative X-ray radiographs. The best results were achieved with radiographs including the bilateral anterior superior iliac spines and the cranial part of non-fractured pelvises. More... »

PAGES

225-231

References to SciGraph publications

  • 2009. Statistically Deformable 2D/3D Registration for Accurate Determination of Post-operative Cup Orientation from Single Standard X-ray Radiograph in MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION – MICCAI 2009
  • 2007-07-28. Containment versus impingement: finding a compromise for cup placement in total hip arthroplasty in INTERNATIONAL ORTHOPAEDICS
  • 2000. Post-operative Measurement of Acetabular Cup Position Using X-ray/CT Registration in MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION – MICCAI 2000
  • 2007. Precise Estimation of Postoperative Cup Alignment from Single Standard X-Ray Radiograph with Gonadal Shielding in MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION – MICCAI 2007
  • 2010-02-24. Computer assisted determination of acetabular cup orientation using 2D–3D image registration in INTERNATIONAL JOURNAL OF COMPUTER ASSISTED RADIOLOGY AND SURGERY
  • 2008-07-04. Cup positioning in THA: current status and pitfalls. A systematic evaluation of the literature in ARCHIVES OF ORTHOPAEDIC AND TRAUMA SURGERY
  • 2006-06-21. Misinterpretation of cup anteversion in total hip arthroplasty using planar radiography in ARCHIVES OF ORTHOPAEDIC AND TRAUMA SURGERY
  • 2006. 2D/3D Registration for Measurement of Implant Alignment After Total Hip Replacement in MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION – MICCAI 2006
  • 2010-06-16. Statistically Deformable 2D/3D Registration for Estimating Post-operative Cup Orientation from a Single Standard AP X-ray Radiograph in ANNALS OF BIOMEDICAL ENGINEERING
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/s11548-011-0644-7

    DOI

    http://dx.doi.org/10.1007/s11548-011-0644-7

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1003867605

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/21792672


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    36 schema:description PurposeThe 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. With a statistical shape model, this method allows reconstructing a patient-specific 3D-model of the pelvis from a standard AP X-ray radiograph. Cup orientation (inclination and anteversion) is then calculated with respect to the anterior pelvic plane that is derived from the reconstructed model.Materials and methodsThe validation study was conducted retrospectively on datasets of 29 patients (31 hips). Among them, there were 15 men (15 hips) and 14 women (16 hips). The average age of the patients was 69.4±8.5 (49−82) years. Each dataset has one postoperative X-ray radiograph and one postoperative CT scan. The postoperative CT scan for each patient was used to establish the ground truth for the cup orientation. The cup anteversion and inclination that were calculated from the 2D/3D reconstruction method were compared to the associated ground truth. To validate reproducibility and reliability, two observers performed measurements for each dataset twice in order to measure the reproducibility and the reliability of the 2D/3D reconstruction method.ResultsOur validation study demonstrated a mean accuracy of 0.4 ± 1.8° (−2.6° to 3.3°) for inclination and a mean accuracy of 0.6±1.5° (−2.0° to 3.9°) for anteversion. Through the Bland-Altman analysis, no systematic errors in accuracy were detected. The method showed very good consistency for both parameters.ConclusionsOur 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 from postoperative X-ray radiographs. The best results were achieved with radiographs including the bilateral anterior superior iliac spines and the cranial part of non-fractured pelvises.
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    44 Bland-Altman analysis
    45 CT scan
    46 ConclusionsOur validation results
    47 MethodsThe validation study
    48 ResultsOur validation study
    49 THA
    50 accuracy
    51 age
    52 aim
    53 analysis
    54 anterior pelvic plane
    55 anterior superior iliac spine
    56 anteversion
    57 arthroplasty
    58 associated ground truth
    59 average age
    60 better results
    61 bilateral anterior superior iliac spines
    62 consistency
    63 cranial part
    64 cup anteversion
    65 cup orientation
    66 dataset
    67 determination
    68 error
    69 good consistency
    70 ground truth
    71 hip arthroplasty
    72 iliac spine
    73 inclination
    74 materials
    75 mean accuracy
    76 measurements
    77 men
    78 method
    79 model
    80 non-fractured pelvises
    81 observer
    82 order
    83 orientation
    84 parameters
    85 part
    86 patients
    87 pelvic plane
    88 pelvis
    89 plane
    90 postoperative CT scans
    91 radiographs
    92 ray radiographs
    93 reconstructed model
    94 reconstruction method
    95 reconstruction-based methods
    96 reliability
    97 reproducibility
    98 reproducible technique
    99 respect
    100 results
    101 scans
    102 shape
    103 shape model
    104 spine
    105 standard AP X
    106 statistical shape
    107 statistical shape model
    108 study
    109 superior iliac spine
    110 systematic errors
    111 technique
    112 total hip arthroplasty
    113 truth
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