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Cerebellar and Brainstem Displacement Measured with DENSE MRI in Chiari Malformation Following Posterior Fossa Decompression Surgery.
Eppelheimer, Maggie S; Nwotchouang, Blaise Simplice Talla; Heidari Pahlavian, Soroush; Barrow, Jack W; Barrow, Daniel L; Amini, Rouzbeh; Allen, Philip A; Loth, Francis; Oshinski, John N.
Afiliação
  • Eppelheimer MS; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Nwotchouang BST; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Heidari Pahlavian S; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Barrow JW; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Barrow DL; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Amini R; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Allen PA; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Loth F; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
  • Oshinski JN; From the Conquer Chiari Research Center, Departments of Biomedical Engineering (M.S.E., B.S.T.N., F.L.) and Psychology (P.A.A.), University of Akron, 264 Wolf Ledges Pkwy, #211B, Akron, OH 44325; Laboratory of FMRI Technology (LOFT), USC Stevens Neuroimaging and Informatics Institute, University of
Radiology ; 301(1): 187-194, 2021 10.
Article em En | MEDLINE | ID: mdl-34313469
ABSTRACT
Background Posterior fossa decompression (PFD) surgery is a treatment for Chiari malformation type I (CMI). The goals of surgery are to reduce cerebellar tonsillar crowding and restore posterior cerebral spinal fluid flow, but regional tissue biomechanics may also change. MRI-based displacement encoding with stimulated echoes (DENSE) can be used to assess neural tissue displacement. Purpose To assess neural tissue displacement by using DENSE MRI in participants with CMI before and after PFD surgery and examine associations between tissue displacement and symptoms. Materials and Methods In a prospective, HIPAA-compliant study of patients with CMI, midsagittal DENSE MRI was performed before and after PFD surgery between January 2017 and June 2020. Peak tissue displacement over the cardiac cycle was quantified in the cerebellum and brainstem, averaged over each structure, and compared before and after surgery. Paired t tests and nonparametric Wilcoxon signed-rank tests were used to identify surgical changes in displacement, and Spearman correlations were determined between tissue displacement and presurgery symptoms. Results Twenty-three participants were included (mean age ± standard deviation, 37 years ± 10; 19 women). Spatially averaged (mean) peak tissue displacement demonstrated reductions of 46% (79/171 µm) within the cerebellum and 22% (46/210 µm) within the brainstem after surgery (P < .001). Maximum peak displacement, calculated within a circular 30-mm2 area, decreased by 64% (274/427 µm) in the cerebellum and 33% (100/300 µm) in the brainstem (P < .001). No significant associations were identified between tissue displacement and CMI symptoms (r < .74 and P > .012 for all; Bonferroni-corrected P = .0002). Conclusion Neural tissue displacement was reduced after posterior fossa decompression surgery, indicating that surgical intervention changes brain tissue biomechanics. For participants with Chiari malformation type I, no relationship was identified between presurgery tissue displacement and presurgical symptoms. © RSNA, 2021 Online supplemental material is available for this article.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Malformação de Arnold-Chiari / Complicações Pós-Operatórias / Tronco Encefálico / Imageamento por Ressonância Magnética / Cerebelo / Descompressão Cirúrgica Idioma: En Ano de publicação: 2021 Tipo de documento: Article
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Malformação de Arnold-Chiari / Complicações Pós-Operatórias / Tronco Encefálico / Imageamento por Ressonância Magnética / Cerebelo / Descompressão Cirúrgica Idioma: En Ano de publicação: 2021 Tipo de documento: Article