EOS Low-Dose Radiography

Escott, Benjamin G.; Ravi, Bheeshma; Weathermon, Adam; Acharya, Jay; Gordon, Christopher L.; Babyn, Paul; Kelley, Simon P.; Narayanan, Unni G.

doi:10.2106/jbjs.l.00989

Cited by 113 publications

(43 citation statements)

References 22 publications

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“…The results are comparable with the length measurements performed by Escott et al [13], who compared four different measurement techniques (standard radiographs, CT scans, EOS-slow, and EOS-fast) for leg length measurements with respect to a phantom of known length. EOS-slow measurements performed most accurately with an average 0.5% underestimation of the phantom length.…”

Section: Discussionsupporting

confidence: 86%

“…Most studies use conventional means such as radiographs or MRI [13, 33–35]. Terjesen et al, however, showed that 95% of the ultrasound leg length measurements on 45 subjects were within 7 mm of the radiographic measurements [21].…”

Section: Discussionmentioning

confidence: 99%

“…For repeated measurements, accumulative radiation dosage is also an issue, and as such, less or noninvasive analysis becomes desirable. EOS systems have shown significant radiation reduction and similarly reliable results in their analysis [12, 13]. EOS also has the ability to analyse subjects in various positions [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reliability of an Integrated Ultrasound and Stereophotogrammetric System for Lower Limb Anatomical Characterisation

Greatrex

Montefiori

Grupp

et al. 2017

Applied Bionics and Biomechanics

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Background Lower extremity analysis for preoperative total knee and hip arthroplasty routines can increase surgery success rate and hence reduce associated costs. Current tools are limited by being invasive, limited to supine analysis, or too expensive. This study aimed to propose and validate a device, OrthoPilot®, based on the combined use of a stereophotogrammetric and ultrasound system which can in vivo and noninvasively measure varus/valgus, flexion/extension, femur and tibia torsion, and femur and tibia lengths. Methods A phantom was measured by four operators to determine the resolution of the system. Interoperator variability was measured on three operators who measured the above six variables on both legs of three subjects in standing and supine positions. Intraoperator variability was assessed on data from three repeats from 9 subjects (18 legs). Results All 6 variables were reliably detected on a phantom, with a resolution of 1 mm and 0.5°. Inter- and intraoperator consistency was observed for varus/valgus, flexion/extension, and length measurements on the healthy subjects in standing and supine positions (all ICC > 0.93). For torsion measurements, there was a considerable variation. Conclusion The proposed system, when used on healthy subjects, allowed reliable measurements of key parameters for preoperative procedures in both supine and standing positions. Accuracy testing and further validation on patient populations will be the next step toward its clinical adoption.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Reliability of an Integrated Ultrasound and Stereophotogrammetric System for Lower Limb Anatomical Characterisation

Greatrex

Montefiori

Grupp

et al. 2017

Applied Bionics and Biomechanics

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“…2 ). 10 11) The EOS image is reconstructed as if it was acquired in the patient's reference plane and limits the distortion to the patient's thickness instead of the whole distance between the source and the detector. 7) In particular, EOS is useful when measuring the sagittal alignment on spine and pelvis images by drawing a line along the whole vertebra or calibrating it to the center of both hip joints.…”

mentioning

confidence: 99%

Reliability of the EOS Imaging System for Assessment of the Spinal and Pelvic Alignment in the Sagittal Plane

et al. 2018

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BackgroundThe sagittal alignment of the spine and pelvis is not only closely related to the overall posture of the body but also to the evaluation and treatment of spine disease. In the last few years, the EOS imaging system, a new low-dose radiation X-ray device, became available for sagittal alignment assessment. However, there has been little research on the reliability of EOS. The purpose of this study was to evaluate the intrarater and interrater reliability of EOS for the sagittal alignment assessment of the spine and pelvis.MethodsRecords of 46 patients were selected from the EOS recording system between November 2016 and April 2017. The exclusion criteria were congenital spinal anomaly and deformity, and previous history of spine and pelvis operation. Sagittal parameters of the spine and pelvis were measured by three examiners three times each using both manual and EOS methods. Means comparison t-test, Pearson bivariate correlation analysis, and reliability analysis by intraclass correlation coefficients (ICCs) for intrarater and interrater reliability were performed using R package “irr.”ResultsWe found excellent intrarater and interrater reliability of EOS measurements. For intrarater reliability, the ICC ranged from 0.898 to 0.982. For interrater reliability, the ICC ranged from 0.794 to 0.837. We used a paired t-test to compare the values measured by manual and EOS methods: there was no statistically significant difference between the two methods. Correlation analysis also showed a statistically significant positive correlation.ConclusionsEOS showed excellent reliability for assessment of the sagittal alignment of the spine and pelvis.

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“…This upright standing position allows for a more accurate recording of the patient's functional weight-bearing leg alignment [10]. Furthermore, EOS images provide information on the whole leg, not just a pelvic overview, and the patient is exposed to a lower radiation dose than with a conventional X-ray [11,12]. Hence, it is possible to extract clinical leg parameters that have not been previously studied in relation to gait.…”

Section: Introductionmentioning

confidence: 99%

Determination of Leg Alignment in Hip Osteoarthritis Patients with the EOS® System and the Effect on External Joint Moments during Gait

et al. 2020

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The present study considered the entire leg alignment and links static parameters to the external joint moments during gait in patients with hip osteoarthritis. Eighteen patients with unilateral hip osteoarthritis were measured using the EOS® system. Clinical leg alignment and femoral parameters were extracted from the 3D reconstruction of the EOS images. A 3D gait analysis was performed and external knee and hip adduction moments were computed and compared to 18 healthy controls in the same age group. The knee adduction moments of the involved leg were strongly correlated to the femoral offset and the varus/valgus alignment. These parameters alone explained over 50% of the variance in the knee adduction moments. Adding the pelvic drop of the contralateral side increased the model of femoral offset and varus/valgus alignment and explained 78% of the knee adduction moment during the first half of the stance. The hip adduction moments were best associated with the hip kinematics and not the leg alignment.

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EOS Low-Dose Radiography

Abstract: This study assesses the reliability and accuracy of a diagnostic test used for clinical decision-making.

Cited by 113 publications

References 22 publications

Reliability of an Integrated Ultrasound and Stereophotogrammetric System for Lower Limb Anatomical Characterisation

Reliability of an Integrated Ultrasound and Stereophotogrammetric System for Lower Limb Anatomical Characterisation

Reliability of the EOS Imaging System for Assessment of the Spinal and Pelvic Alignment in the Sagittal Plane

Determination of Leg Alignment in Hip Osteoarthritis Patients with the EOS® System and the Effect on External Joint Moments during Gait

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