Acetabular orientation variability and symmetry based on CT scans of adults

Lubovsky, Omri; Peleg, Eran; Joskowicz, Leo; Liebergall, Meir; Khoury, Amal

doi:10.1007/s11548-010-0521-9

Cited by 35 publications

(31 citation statements)

References 21 publications

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“…Our average healthy parameter values were within a standard deviation of that from previous studies: pelvic (Baudoin et al, 2008;Chaibi et al, 2012;Okuda et al, 2007;Strecker et al, 1997;Yoshimoto et al, 2005), acetabular (Fowkes et al, 2011;Lubovsky et al, 2010Lubovsky et al, , 2012Tohtz et al, 2010), and femoral: (Cooke et al, 1991;Moreland et al, 1987;Than et al, 2012).…”

Section: Increase In Femoral Mechanical Angle (Fma)supporting

confidence: 82%

Healthy vs. osteoarthritic hips: A comparison of hip, pelvis and femoral parameters and relationships using the EOS® system

Bendaya

Lazennec

Anglin

et al. 2015

Clinical Biomechanics

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Differences between the groups suggest either degenerative changes over time or inherent differences between individuals that may contribute to the disease progression. These data provide a basis for longitudinal and post-surgery studies. Due to the considerable variability amongst individuals and the considerable overlap between groups, patients should be evaluated individually and at multiple joints when planning hip, knee and spine surgery.

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Section: Increase In Femoral Mechanical Angle (Fma)supporting

confidence: 82%

Healthy vs. osteoarthritic hips: A comparison of hip, pelvis and femoral parameters and relationships using the EOS® system

Bendaya

Lazennec

Anglin

et al. 2015

Clinical Biomechanics

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“…Some of the criticisms pertaining to previous threedimensional studies have involved loss of accuracy due to surface modification such as aggressive smoothing and surface simplification through mesh size reduction 6,7,10,27,28,32 . The highresolution scans and improved capabilities of commercially available rendering software used in the present study allowed us to address these deficiencies, permitting smoothing algorithms with negligible change in volume for the models (<0.1%).…”

Section: Discussionmentioning

confidence: 99%

“…A small number of studies have fit a plane to the acetabulum, providing true three-dimensional measures of orientation while controlling for pelvic positioning. Several studies have performed direct measurements on anatomic or cadaveric specimens 5,8,23 , and others have leveraged the benefits of computer-generated renderings 6,11,[27][28][29] . Interestingly, these studies have suggested that females have acetabula that are more anteverted than males.…”

mentioning

confidence: 99%

A Novel Approach for Determining Three-Dimensional Acetabular Orientation: Results from Two Hundred Subjects

Higgins¹,

Spratley

Boe

et al. 2014

The Journal of Bone and Joint Surgery-American Volume

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A highly accurate and reproducible method for determining the orientation of the acetabulum's aperture will benefit both surgeons and patients, by further refining the distinctions between normal and abnormal hip characteristics. Enhanced understanding of the acetabulum could be useful in the diagnostic, planning, and execution stages for surgical procedures of the hip or in advancing the design of new implant systems.

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“…A second method that involves selecting anatomical landmarks for APP manually has inconsistencies because the ASIS and pubic tubercle are ambiguous anatomical structures that are difficult to represent with specific points. Furthermore, manual selection of landmark points on CT images is tedious, time-consuming and error-prone [11]. A third method utilizes the SB plane.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, they did not compare their results to those obtained by a highly experienced surgeon. Lobovsky et al [11] manually selected landmarks to derive the APP. This method is commonly applied but is tedious and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

A robust method to extract the anterior pelvic plane from CT volume independent of pelvic pose

Lee

Kim

et al. 2017

Computer Assisted Surgery

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Purpose: The anterior pelvic plane (APP) is commonly used as a reference plane to assess acetabular orientation. However, conventional methods for determining the APP may not be accurate and are prone to user variability. To overcome these issues, we developed a robust method to accurately extract the APP independent of pelvic pose using three-dimensional pelvic computed tomography (CT). Materials and methods: Twenty-eight studies for suspected nonmusculoskeletal conditions were obtained. The APP was determined by four landmarks that were automatically extracted from user-defined regions of interest (ROIs) with compensation of pelvic pose. The APP defined from these landmarks was quantitatively compared to the APPs determined by an expert and an unskilled. Intraobserver reliability was measured to evaluate the time-interval variability. Finally, we evaluate the robustness of this method to patient posture using an arbitrarily rotated volume. The intraclass correlation coefficients (ICCs) were calculated to determine the interobserver and intraobserver reliabilities. Results:The ICC values for the four landmarks and the APP were similar between the semiautomated method and expert determination (ICC >0.937). The ICC values for intraobserver reliability over time for our method were all 1, demonstrating high reliability. Furthermore, agreement between the parameters determined from the original volume and the rotated volume was nearly perfect. Conclusions: Our method is a useful measurement tool for the APP as it is robust, and the results were similar to an experienced surgeon's determination. Furthermore, it was independent to the direction of the CT slice and more robust than a measurement by an unskilled.

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Acetabular orientation variability and symmetry based on CT scans of adults

Cited by 35 publications

References 21 publications

Healthy vs. osteoarthritic hips: A comparison of hip, pelvis and femoral parameters and relationships using the EOS® system

Healthy vs. osteoarthritic hips: A comparison of hip, pelvis and femoral parameters and relationships using the EOS® system

A Novel Approach for Determining Three-Dimensional Acetabular Orientation: Results from Two Hundred Subjects

A robust method to extract the anterior pelvic plane from CT volume independent of pelvic pose

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