Dynamic changes of the spinal canal in patients with cervical spondylosis at flexion and extension using magnetic resonance imaging.
Invest Radiol
; 33(8): 444-9, 1998 Aug.
Article
em En
| MEDLINE
| ID: mdl-9704283
ABSTRACT
RATIONALE AND OBJECTIVES:
The authors determine the dynamic changes of the spinal canal during flexion and extension in patients with cervical spondylosis.METHODS:
Forty-six patients were studied inside a whole-body magnetic resonance (MR) scanner with between 50 degrees of flexion and 30 degrees of extension, using a positioning device. At neutral position (0 degree) and maximum flexion and extension sagittal T2-weighted turbo spin echo sequences were acquired.RESULTS:
A significant (P < or = 0.05) increase of spinal stenosis was found at extension (48%, 22 of 46 patients) when compared with flexion (24%, 11 of 46). Cervical cord compression was diagnosed at flexion in 5 patients (11%) and at extension in 9 patients (20%). Concerning the number of patients with cervical cord compression at flexion and extension, significant differences (P < or = 0.05) were found in patients with degenerative changes at four segments compared with patients with one segment involvement.CONCLUSIONS:
Magnetic resonance imaging identified a significant percentage of increased spinal stenosis at flexion and, especially, at extension, which was not observed at neutral position (0 degree). Flexion and extension MR imaging demonstrates additional information using a noninvasive technique concerning the dynamic factors in the pathogenesis of cervical spondylotic myelopathy.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Canal Medular
/
Osteofitose Vertebral
/
Imageamento por Ressonância Magnética
/
Vértebras Cervicais
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
/
Prognostic_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
1998
Tipo de documento:
Article