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[PMID]:27864891
[Au] Autor:Standefer KD; Dempsey M; Jo C; Kim HKW
[Ad] Endereço:Texas Scottish Rite Hospital for Children, Dallas, Texas.
[Ti] Título:3D MRI Quantification of Femoral Head Deformity in Legg-Calvé-Perthes Disease.
[So] Source:J Orthop Res;35(9):2051-2058, 2017 Sep.
[Is] ISSN:1554-527X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The purpose of this study was to quantify femoral head deformity in patients with Legg-Calvé-Perthes disease (LCPD) using a novel three dimensional (3D) magnetic resonance imaging (MRI) reconstruction and volume based analysis. Bilateral femoral heads of 17 patients (mean age 9.9 ± 2.0 years; 12 boys, 5 girls) with LCPD were scanned 1-2 times (n = 33 LCPD heads, 20 normal heads) using a 1.5T MRI scanner. Fourteen patients had unilateral and three had bilateral LCPD with five hips in the Waldenström initial stage, 9 in the fragmentation stage, 14 in the reossification stage, and 5 in the healed stage. 3D digital reconstructions of femoral heads were created using MIMICS software. Deformity was quantified using a 3D volume ratio method based on reference hemisphere volume as well as two surface geometry methods. Intra-observer analysis showed that 97% of the LCPD femoral heads were within 10% of the original value and test shapes had 99.6% accuracy. For normal femoral heads, the volume ratios of all except one were between 95 and 98% (n = 20) of a perfect hemisphere volume. For femoral heads affected with LCPD, the volume ratios ranged from 43% to 96% of a perfect hemisphere (n = 33). The volume ratio method and the two surface geometry comparison methods had high correlation (r = 0.89 and 0.96). In summary, the 3D MRI volume ratio method allowed accurate quantification and demonstrated small changes (<10%) of the femoral head deformity in LCPD. This method may serve as a useful tool to evaluate the effects of treatment on femoral head shape. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2051-2058, 2017.
[Mh] Termos MeSH primário: Coxa Magna/diagnóstico por imagem
Cabeça do Fêmur/diagnóstico por imagem
Doença de Legg-Calve-Perthes/diagnóstico por imagem
[Mh] Termos MeSH secundário: Criança
Coxa Magna/etiologia
Feminino
Cabeça do Fêmur/patologia
Seres Humanos
Imagem Tridimensional
Doença de Legg-Calve-Perthes/complicações
Doença de Legg-Calve-Perthes/patologia
Imagem por Ressonância Magnética
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171010
[Lr] Data última revisão:
171010
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161120
[St] Status:MEDLINE
[do] DOI:10.1002/jor.23484



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