ArticleJournal of the American Academy of Orthopaedic Surgeons. Global research & reviews2023
Attention to Detail: The Effect of Fluoroscopic Parallax on Limb Alignment Assessment During Corrective Osteotomy.
Article in Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed, 5 citations in OpenAlex.
- Tibial Infratubercle Anterior Closing-Wedge Slope-Reducing Osteotomy With Combined Revision Anterior Cruciate Ligament Reconstruction.Arthroscopy techniques · 2025Article
- Commentary onJournal of the Pediatric Orthopaedic Society of North America · 2025Article
- How Relevant Is the Parallax Effect on Low Centered Pelvic Radiographs in Total Hip Arthroplasty.Journal of personalized medicine · 2023Article
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe accuracy of a corrective osteotomy is dependent on many factors. One error rarely considered is using noncentered fluoroscopic imaging to assess intraoperative alignment. This study quantified the coronal alignment error produced by visual parallax per interval changes in vertical and horizontal positioning of the C-arm and alignment rod during intraoperative evaluation.
methodsUnilateral hip, ankle, and knee fluoroscopic images were obtained from a single intact cadaveric specimen. A center-center fluoroscopic image was obtained by moving the C-arm appeared in the center square of the nine-box grid. With the base of the C-arm stationary, the radiograph generator/intensifier portion of the C-arm was translated medially until the target bone appeared on the edge of the fluoroscopic image.
resultsOne hundred eight images were obtained. Measurement error increased by an average of 14% per 10 mm of horizontal C-arm offset. Minimal effect was seen if the obtained image was within 5 mm of the true center; however, once 55 mm of offset was reached, all experimental conditions resulted in at least 10 mm of parallax error.
conclusionOur results demonstrate that small variations in C-arm positioning can create statistically significant inaccuracies when assessing limb alignment using intraoperative fluoroscopy.
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