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Dynamic imaging of the fetal heart using metric optimized gating.
Roy, Christopher W; Seed, Mike; van Amerom, Joshua F P; Al Nafisi, Bahiyah; Grosse-Wortmann, Lars; Yoo, Shi-Joon; Macgowan, Christopher K.
Afiliação
  • Roy CW; Departments of Medical Biophysics and Medical Imaging, University of Toronto, Toronto, Canada.
Magn Reson Med ; 70(6): 1598-607, 2013 Dec.
Article em En | MEDLINE | ID: mdl-23382068
PURPOSE: Advances in fetal cardiovascular magnetic resonance imaging have been limited by the absence of a reliable cardiac gating signal. The purpose of this work was to develop and validate metric-optimized gating (MOG) for cine imaging of the fetal heart. THEORY AND METHODS: Cine MR and electrocardiogram data were acquired in healthy adult volunteers for validation of the MOG method. Comparison of MOG and electrocardiogram reconstructions was performed based on the image quality for each method, and the difference between MOG and electrocardiogram trigger times. Fetal images were also acquired, their quality evaluated by experienced radiologists, and the theoretical error in the MOG trigger times were calculated. RESULTS: Excellent agreement between electrocardiogram and MOG reconstructions was observed. The experimental errors in adult MOG trigger times for all five volunteers were ± (7, 25, 17, 8, and 13) ms. Fetal images captured normal and diseased cardiac dynamics. CONCLUSION: MOG for cine imaging of the fetal myocardium was developed and validated in adults. Using MOG, the first gated MR images of the human fetal myocardium were obtained. Small moving structures were visualized during radial contraction, thus capturing normal fetal cardiac wall motion and permitting assessment of cardiac function.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Diagnóstico Pré-Natal / Algoritmos / Interpretação de Imagem Assistida por Computador / Aumento da Imagem / Imagem Cinética por Ressonância Magnética / Técnicas de Imagem de Sincronização Cardíaca / Coração Fetal Tipo de estudo: Diagnostic_studies Limite: Adult / Female / Humans / Male Idioma: En Revista: Magn Reson Med Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2013 Tipo de documento: Article País de afiliação: Canadá

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Diagnóstico Pré-Natal / Algoritmos / Interpretação de Imagem Assistida por Computador / Aumento da Imagem / Imagem Cinética por Ressonância Magnética / Técnicas de Imagem de Sincronização Cardíaca / Coração Fetal Tipo de estudo: Diagnostic_studies Limite: Adult / Female / Humans / Male Idioma: En Revista: Magn Reson Med Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2013 Tipo de documento: Article País de afiliação: Canadá