Accuracy of magnetic resonance imaging for diagnosing hallux valgus

Abstract Objective: To assess the accuracy of magnetic resonance imaging (MRI) for the diagnosis of hallux valgus using radiography during weight bearing as the gold standard. Materials and Methods: This was a retrospective analysis of all patients undergoing MRI of the foot and radiography of the foot during weight bearing at our institution between January and June of 2015. The hallux valgus angle (HVA) was measured on MRI and radiography. The Wilcoxon signed-rank test and simple linear regression were used in order to compare measurements. Patients were divided into two groups according to the HVA determined on radiography: > 15° (hallux valgus) and ≤ 15° (control). Qualitative and quantitative assessments of MRI scans were performed. For quantitative assessment, receiver operating characteristic curves were used in order to determine the HVA cutoff with the highest accuracy. Results: A total of 66 MRI scans were included, 22 in the hallux valgus group and 44 in the control group. Wilcoxon signed-rank tests indicated a significant difference between the radiography and MRI measurements. Simple linear regression showed a nonlinear relationship between the measurements and values did not present a strong correlation. In comparison with the radiography measurements, MRI with an HVA cutoff of 16.4° exhibited the highest accuracy (86%). The accuracy of the subjective (qualitative) assessment was inferior to the objective assessment (measurement of the HVA). Conclusion: Hallux valgus can be diagnosed by measuring the HVA on MRI, satisfactory accuracy being achieved with an HVA cutoff of 16.4°.

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Main Authors: Helito,Paulo Victor Partezani, Rocha,Stephano Raydan Ramalho, Ortiz,Rafael Trevisan, Cerri,Giovanni Guido, Leite,Claudia da Costa, Rodrigues,Marcelo Bordalo
Format: Digital revista
Language:English
Published: Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem 2020
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842020000200081
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spelling oai:scielo:S0100-398420200002000812020-04-07Accuracy of magnetic resonance imaging for diagnosing hallux valgusHelito,Paulo Victor PartezaniRocha,Stephano Raydan RamalhoOrtiz,Rafael TrevisanCerri,Giovanni GuidoLeite,Claudia da CostaRodrigues,Marcelo Bordalo Magnetic resonance imaging Foot Hallux valgus Forefoot, human/diagnostic imaging Metatarsophalangeal joint/ diagnostic imaging Abstract Objective: To assess the accuracy of magnetic resonance imaging (MRI) for the diagnosis of hallux valgus using radiography during weight bearing as the gold standard. Materials and Methods: This was a retrospective analysis of all patients undergoing MRI of the foot and radiography of the foot during weight bearing at our institution between January and June of 2015. The hallux valgus angle (HVA) was measured on MRI and radiography. The Wilcoxon signed-rank test and simple linear regression were used in order to compare measurements. Patients were divided into two groups according to the HVA determined on radiography: > 15° (hallux valgus) and ≤ 15° (control). Qualitative and quantitative assessments of MRI scans were performed. For quantitative assessment, receiver operating characteristic curves were used in order to determine the HVA cutoff with the highest accuracy. Results: A total of 66 MRI scans were included, 22 in the hallux valgus group and 44 in the control group. Wilcoxon signed-rank tests indicated a significant difference between the radiography and MRI measurements. Simple linear regression showed a nonlinear relationship between the measurements and values did not present a strong correlation. In comparison with the radiography measurements, MRI with an HVA cutoff of 16.4° exhibited the highest accuracy (86%). The accuracy of the subjective (qualitative) assessment was inferior to the objective assessment (measurement of the HVA). Conclusion: Hallux valgus can be diagnosed by measuring the HVA on MRI, satisfactory accuracy being achieved with an HVA cutoff of 16.4°.info:eu-repo/semantics/openAccessPublicação do Colégio Brasileiro de Radiologia e Diagnóstico por ImagemRadiologia Brasileira v.53 n.2 20202020-04-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842020000200081en10.1590/0100-3984.2019.0054
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country Brasil
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region America del Sur
libraryname SciELO
language English
format Digital
author Helito,Paulo Victor Partezani
Rocha,Stephano Raydan Ramalho
Ortiz,Rafael Trevisan
Cerri,Giovanni Guido
Leite,Claudia da Costa
Rodrigues,Marcelo Bordalo
spellingShingle Helito,Paulo Victor Partezani
Rocha,Stephano Raydan Ramalho
Ortiz,Rafael Trevisan
Cerri,Giovanni Guido
Leite,Claudia da Costa
Rodrigues,Marcelo Bordalo
Accuracy of magnetic resonance imaging for diagnosing hallux valgus
author_facet Helito,Paulo Victor Partezani
Rocha,Stephano Raydan Ramalho
Ortiz,Rafael Trevisan
Cerri,Giovanni Guido
Leite,Claudia da Costa
Rodrigues,Marcelo Bordalo
author_sort Helito,Paulo Victor Partezani
title Accuracy of magnetic resonance imaging for diagnosing hallux valgus
title_short Accuracy of magnetic resonance imaging for diagnosing hallux valgus
title_full Accuracy of magnetic resonance imaging for diagnosing hallux valgus
title_fullStr Accuracy of magnetic resonance imaging for diagnosing hallux valgus
title_full_unstemmed Accuracy of magnetic resonance imaging for diagnosing hallux valgus
title_sort accuracy of magnetic resonance imaging for diagnosing hallux valgus
description Abstract Objective: To assess the accuracy of magnetic resonance imaging (MRI) for the diagnosis of hallux valgus using radiography during weight bearing as the gold standard. Materials and Methods: This was a retrospective analysis of all patients undergoing MRI of the foot and radiography of the foot during weight bearing at our institution between January and June of 2015. The hallux valgus angle (HVA) was measured on MRI and radiography. The Wilcoxon signed-rank test and simple linear regression were used in order to compare measurements. Patients were divided into two groups according to the HVA determined on radiography: > 15° (hallux valgus) and ≤ 15° (control). Qualitative and quantitative assessments of MRI scans were performed. For quantitative assessment, receiver operating characteristic curves were used in order to determine the HVA cutoff with the highest accuracy. Results: A total of 66 MRI scans were included, 22 in the hallux valgus group and 44 in the control group. Wilcoxon signed-rank tests indicated a significant difference between the radiography and MRI measurements. Simple linear regression showed a nonlinear relationship between the measurements and values did not present a strong correlation. In comparison with the radiography measurements, MRI with an HVA cutoff of 16.4° exhibited the highest accuracy (86%). The accuracy of the subjective (qualitative) assessment was inferior to the objective assessment (measurement of the HVA). Conclusion: Hallux valgus can be diagnosed by measuring the HVA on MRI, satisfactory accuracy being achieved with an HVA cutoff of 16.4°.
publisher Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem
publishDate 2020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-39842020000200081
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