Advanced Imaging of Chiari 1 Malformations

Type I Chiari malformations are congenital deformities involving cerebellar tonsillar herniation downward through the foramen magnum. Structurally, greater than 5 mm of tonsillar descent in adults and more than 6 mm in children is consistent with type I Chiari malformations. However, the radiographi...

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Bibliographic Details
Published inNeurosurgery clinics of North America Vol. 26; no. 4; p. 519
Main Authors Fakhri, Akbar, Shah, Manish N, Goyal, Manu S
Format Journal Article
LanguageEnglish
Published United States 01.10.2015
Subjects
Arnold-Chiari Malformation - diagnosis
Arnold-Chiari Malformation - diagnostic imaging
Brain - diagnostic imaging
Cerebrospinal Fluid - diagnostic imaging
Foramen Magnum - diagnostic imaging
Humans
Image Enhancement - methods
Magnetic Resonance Imaging - methods
Radiography
Cine fast image spin precession
Cerebrospinal fluid flow imaging
MRI
Chiari malformation
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Summary:Type I Chiari malformations are congenital deformities involving cerebellar tonsillar herniation downward through the foramen magnum. Structurally, greater than 5 mm of tonsillar descent in adults and more than 6 mm in children is consistent with type I Chiari malformations. However, the radiographic severity of the tonsillar descent does not always correlate well with the clinical symptomatology. Advanced imaging can help clinically correlate imaging to symptoms. Specifically, cerebrospinal fluid (CSF) flow abnormalities are seen in patients with type I Chiari malformation. Advanced MRI involving cardiac-gated and phase-contrast MRI affords a view of such CSF flow abnormalities.
ISSN:1558-1349
DOI:10.1016/j.nec.2015.06.012