Inter-Rater and Intra-Rater Repeatability and Reliability of EOS 3-Dimensional Imaging Analysis Software

Demzik, Alysen; Alvi, Hasham M.; Delagrammaticas, Dimitri E.; Martell, John M.; Beal, Matthew D.; Manning, David W.

doi:10.1016/j.arth.2015.11.026

Cited by 19 publications

(25 citation statements)

References 30 publications

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“…Some reports have suggested that the reliability of the acetabular component measurement on plain radiographs using a normal PACS system is high [26][27] [28]. The EOS system is a novel imaging method using biplanar low-dose X-rays, which can evaluate implant alignment semiautomatically [16]. Lazennec et al reported that the reliability of conventional acetabular component measurement on plain radiographs was lower than the performance of the EOS system [13].…”

Section: Discussionmentioning

confidence: 99%

“…Although many reports on the reliability of evaluation methods after THA have concerned acetabular components, there are a few reports on the femoral component [16][17] [27]. Some studies focused on the stability of the component and the bone reaction of the femur [29], however, there have been no studies exploring the reliability of the femoral component varus-valgus and exion-extension angles.…”

Section: Discussionmentioning

confidence: 99%

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Interobserver and Intraobserver Repeatability and Reliability of Three-Dimensional Postoperative Evaluation Software in Total Hip Arthroplasty

Konno¹,

Hagiwara²,

Nakamura³

et al. 2020

Preprint

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Background: We investigated the reliability of measurement of the alignment and position of the prosthetic components after total hip arthroplasty (THA) using three-dimensional computed tomography (CT)-based postoperative evaluation software.Methods: We evaluated the postoperative CT data from 20 hips in 20 patients, using postoperative evaluation software. The alignment and three-dimensional positioning of the cup and stem were assessed by eight orthopedic surgeons for repeatability (intraobserver reliability) and reproducibility (interobserver reliability) of postoperative evaluation software using intra-class correlation coefficients (ICC). The radiographic inclination (RI) and radiographic anteversion (RA) of the cup, and anteversion, varus-valgus angle and flexion-extension angles of the stem were measured for alignment. The implant positioning was measured along three axes, X-axis (transverse), Y-axis (sagittal), and Z-axis (longitudinal).Results: The intra- and inter-observer ICC of alignment measurement were very good for both cup and stem (0.86–1.00). The intra-observer and inter-observer ICC of cup positioning were very good in X-axis and Y-axis (0.91–0.94) and good in Z-axis (0.68–0.80). The intra-observer and inter-observer ICC of implant positioning were very good for the stem (0.98–0.99) for all axes.Conclusion: CT-based postoperative evaluation software was able to evaluate the position of total hip implants with high reproducibility.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Interobserver and Intraobserver Repeatability and Reliability of Three-Dimensional Postoperative Evaluation Software in Total Hip Arthroplasty

Konno¹,

Hagiwara²,

Nakamura³

et al. 2020

Preprint

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“…Several studies have measured the PSI in supine, standing, and sitting postures, 3,[5][6][7][8][9][10][11][12][13][14] and many factors such as age, spinal deformities, and disease type have been reported to correlate with PSI. 4,5,8,13,14 However, little is known regarding the reproducibility of PSI measurements on radiographs, which depends on two major factors: (1) measurement variation and (2) positioning variation of the pelvis against the radiographic plane while acquiring images. Thus, to evaluate the variation of the patient's pelvic position, it is required to minimize the influence of the measurement variation.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4] Several reports to date have measured the PSI on radiographs in supine, standing, and sitting postures to understand the rotational change of the pelvis among these postures. 3,[5][6][7][8][9][10][11][12][13][14] Furthermore, some reports have measured the longitudinal change of the PSI after hip surgery. 11,12,15 PSI measurements in these reports are based on an assumption that a single radiograph is representative of the position of the pelvis in each body posture, regardless of the physical condition of the pelvis and technique employed to instruct patients as to the posture they should adapt during the acquisition of the film.…”

Section: Introductionmentioning

confidence: 99%

Reproducibility of pelvic sagittal inclination while acquiring radiographs in supine and standing postures

Uemura

Takao

Otake

et al. 2019

J Orthop Surg (Hong Kong)

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Pelvic position on the sagittal plane is usually evaluated with the pelvic sagittal inclination (PSI) angle from a single radiograph. However, the reproducibility of pelvic positioning has not been investigated, and thus, the validity of measuring the PSI from a single film/time point is not understood. Herein, the reproducibility of a patient's pelvic positions in supine and standing postures was analyzed. Methods: A total of 34 patients who underwent either a pelvic osteotomy or total hip arthroplasty were enrolled in this study. Preoperative radiographs in both supine and standing postures were acquired twice (first X-ray and second X-ray) within 6 months; preoperative computed tomography (CT) images of the full pelvis were also acquired in a supine posture (preop-CT). To eliminate measurement variability, each PSI was automatically measured from radiographs and CT images through the use of CT segmentation and landmark localization followed by intensity-based 2D-3D registration. The absolute difference of PSI among each image was calculated and the intra-class correlation coefficient (ICC) in each posture was also analyzed. Results: The median absolute differences of PSI in the supine posture were 1.3 between the first and second X-rays, 1.2 between the first X-ray and preop-CT, and 1.3 between the second X-ray and preop-CT. The median absolute difference of PSI in the standing posture was 1.5. The ICC was 0.965 (95% CI: 0.939-0.981) in supine and 0.977 (95% CI: 0.954-0.988) during standing. Conclusions: Pelvic positions in supine and standing postures are reproducible. Thus, measuring the PSI from a single radiograph is reliable.

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“…These results are partially consistent with the literature. Demzik et al performed measurements on 25 postoperative images of patients (Demzik, et al 2016) . The three involved physicians followed a training session before performing measurements.…”

Section: Discussionmentioning

confidence: 99%

Reliability of pelvic parameters measurement with sterEOS: preliminary results

Guezou-Philippe¹,

Dardenne²,

Dorniol³

et al.

EPiC Series in Health Sciences

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SterEOS is a software developed by EOS Imaging® allowing the measurement of 3D orthopaedic parameters on two bi-planar radiographs. The goal of this preliminary study was to assess the reliability of the pelvic measurements. Two observers, a novice and an intermediate user, measured three times these parameters on pre and postoperative EOS images coming from ten patients. Intra- and inter-observer precision have been evaluated with intra-class coefficient (ICC) and Bland-Altman graphs. On preoperative EOS images, a high intra- and inter-observer precision (ICC>0.8) was obtained for the measurement of the femoral head diameter, the femur length, the pelvic version and the pelvic obliquity. The offset, the femoral neck length, the pelvic incidence and the sacral slope measurement had a high intra-observer precision but a lower inter-observer precision. The measurement of the acetabulum inclination and anteversion, the CCD angle, the femur torsion, the pelvic rotation and the anterior pelvic plane inclination had a low intra- and inter-observer precision. Similar results were found on postoperative EOS images. Our results are partially consistent with the literature since authors found high intra- and inter-observer precision for all pelvic parameters. Further studies are therefore needed to evaluate the impact of the observer experience on the reliability of those measurements.

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Inter-Rater and Intra-Rater Repeatability and Reliability of EOS 3-Dimensional Imaging Analysis Software

Cited by 19 publications

References 30 publications

Interobserver and Intraobserver Repeatability and Reliability of Three-Dimensional Postoperative Evaluation Software in Total Hip Arthroplasty

Interobserver and Intraobserver Repeatability and Reliability of Three-Dimensional Postoperative Evaluation Software in Total Hip Arthroplasty

Reproducibility of pelvic sagittal inclination while acquiring radiographs in supine and standing postures

Reliability of pelvic parameters measurement with sterEOS: preliminary results

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