title: Dynamic weight-bearing cervical magnetic resonance imaging: technical review and preliminary results.
abstract: BACKGROUND
  Conventional magnetic resonance imaging (MRI) of complex cervical spine disorders may underestimate the magnitude of structural disease because imaging is performed in a nondynamic non-weight-bearing manner. Myelography provides additional information but requires an invasive procedure.
  
  
  METHODS
  This was a prospective review of the first 20 upright weight-bearing cervical MRI procedures with patients in the flexed, neutral, and extended positions conducted in an open-configuration MRI unit.
  
  
  RESULTS
  This technique clearly illustrated the changes in spinal cord compression, angulation, and spinal column alignment that occur during physiologic movements with corresponding changes in midsagittal spinal canal diameter (P < 0.05). Image quality was excellent or good in 90% of the cases.
  
  
  CONCLUSIONS
  Dynamic weight-bearing MRI provides an innovative method for imaging complex cervical spine disorders. This technique is noninvasive and has adequate image quality that may make it a good alternative to cervical myelography.
authors.affiliation: Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY 40202, USA. tvitaz@niky.com
authors.forename: Todd W
authors.initials: TW
authors.lastname: Vitaz
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Shields
authors.forename: George H
authors.initials: GH
authors.lastname: Raque
authors.forename: Stephen G
authors.initials: SG
authors.lastname: Hushek
authors.forename: Robert
authors.initials: R
authors.lastname: Moser
authors.forename: Neil
authors.initials: N
authors.lastname: Hoerter
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Moriarty
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002574:Cervical Vertebrae / Q000473:pathology* / Q000503:physiopathology*; D005240:Feasibility Studies; D005260:Female; D019416:Head Movements / Q000502:physiology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D011446:Prospective Studies; D015203:Reproducibility of Results; D013122:Spinal Diseases / Q000473:pathology*; D016474:Weight-Bearing / Q000502:physiology