Erratum to: Int J CARS DOI 10.1007/s11548-016-1489-x
We regret having misinterpreted the accuracy of Dr. Derbyshire’s method in our discussion section. In his study of 2008, he used a 3-D CAD model to simulate ‘X-ray’ radiographs with a central beam offset of 110 mm medial and 45 mm inferior to the cup opening. Anteversion was corrected ‘exactly’, and the inclination error was less than \(0.16{^{\circ }}\). We wrongly reported that ‘Derbyshire validated his method virtually and showed a reduced error range of \(-0.4{^{\circ }}\) to \(0.8{^{\circ }}\)’. De facto, Dr. Derbyshire investigated a potential error, if the X-ray target point of the central beam is mistakenly assumed to be 10 mm from its true position. The potential error was \(\pm 0.4{^{\circ }}\) and is not associated with the formulae. However, our study was not designed to compare our method with that developed by Dr. Derbyshire; therefore, our results and the main conclusion of our study remain unaffected.
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The online version of the original article can be found under doi:10.1007/s11548-016-1489-x.
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Schwarz, T., Weber, M., Wörner, M. et al. Erratum to: Central X-ray beam correction of radiographic acetabular cup measurement after THA: an experimental study. Int J CARS 12, 839 (2017). https://doi.org/10.1007/s11548-017-1525-5
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DOI: https://doi.org/10.1007/s11548-017-1525-5