ArticleJournal of medical radiation sciences2021
Pre-operative templating for total hip arthroplasty: How does radiographic technique and calibration marker placement affect image magnification?
Article in Journal of medical radiation sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Effect of Marker Ball Positioning on Templating Accuracy in Hip Arthroplasty: A Closed-Loop Audit.Cureus · 2026Article
- Assessing Adequacy of Marker Ball Placement in Preoperative Pelvic X-rays: Are We Missing the Mark?Cureus · 2025Article
- Stem design affects templating adherence in total hip arthroplasty - a retrospective cohort study comparing two types of cementless short stems.Journal of orthopaedic surgery and research · 2025Article
- Planning Accuracy and Stem Offset Assessment in Digital Two-Dimensional Versus Three-Dimensional Planning in Cementless Hip Arthroplasty: A Systematic Review and Meta-Analysis.Journal of clinical medicine · 2024Review
- Article
- A novel bi-planar calibration method for digital templating in total hip arthroplasty.Scientific reports · 2023Article
- Development of an Auxiliary Device for Patellar and Femoral Joint Tangential Axial Radiographic Imaging and a Method for Obtaining an Optimal Radiographic Image Using the Development.Applied bionics and biomechanics · 2022Article
- Pre-operative templating for total hip arthroplasty: How does radiographic technique and calibration marker placement affect image magnification?Journal of medical radiation sciences · 2021Article
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionPre-operative templating using digital radiography is an effective method of planning for total hip arthroplasty (THA) and requires a generalised fixed magnification factor (MF) or external calibration markers (ECM). The effect on image magnification when changing source-to-image distance (SID), object-to-image distance (OID) and different imaging conditions is not well described. This study aims to quantify the range of effects manipulation of radiographic parameters can have on image magnification across different body habitus and imaging conditions.
methodsA simple phantom study was performed. A 25 mm ECM was placed at eight different OID values along the anterior-posterior phantom plane at three different SID values and imaging conditions, and X-rays were obtained. On each radiograph, the ECM was measured using a line calliper tool by three radiographers and recorded. The MF was calculated and recorded.
resultsThe smallest observed image MF was 1.16, for an 8 cm OID, 120 cm SID with the ECM placed within the central ray and the X-ray detector in bucky underneath the X-ray table. The largest image MF was 1.40 for a 15 cm OID, 100 cm SID with the X-ray detector placed underneath an emergency department imaging trolley.
conclusionsDigital pre-operative templating for THA relies on accurate radiographic positioning and is dependent of the patient body habitus, radiographic parameters and imaging conditions selected by the radiographer. The use of appropriately positioned ECMs - placed medially between the patient's internally rotated legs at the level of the greater trochanter, lowers the potential for magnification inaccuracies.
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