title: Magnetic resonance volumetric measurement of endolymphatic space in patients without vertiginous or cochlear symptoms.
abstract: CONCLUSIONS
  Magnetic resonance volumetric measurement of inner ear endolymphatic space (ELS) was performed in patients without vertiginous or cochlear symptoms. The existence of the ELS in patients with chronic rhinosinusitis (CRS) was shown. The ELS in the cochlea and vestibule was classified into four categories. These findings could be useful as a standard reference for further research.
  
  
  OBJECTIVE
  To identify normal values of the ELS in the cochlea and vestibule.
  
  
  METHODS
  Twenty-four patients with CRS were enrolled. Inner ear fluid space images and positive perilymph/positive endolymph images were acquired using a 3.0-tesla unit. Three-dimensional (3-D) images were constructed semi-automatically using both anatomical and tissue information by fusing the 3-D images of the inner ear fluid space and the ELS.
  
  
  RESULTS
  Among all patients, the mean ELS/the total fluid space (TFS) ratio in the cochlea was 8.8% and that in the vestibule was 16.2%. The ELS in the cochlea and vestibule was classified into four categories. Age-related differences were found in the TFS, ELS, and ELS/TFS ratio in the inner ear and the ELS and ELS/TFS ratio in the vestibule.
authors.affiliation: a Otorhinolaryngology, Inui ENT Clinic , Nara , Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Inui
authors.affiliation: b PixSpace. Ltd , Fukuoka , Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Sakamoto
authors.affiliation: c Department of Otorhinolaryngology Head and Neck Surgery , Nara Medical University , Nara , Japan.
authors.forename: Taeko
authors.initials: T
authors.lastname: Ito
authors.affiliation: c Department of Otorhinolaryngology Head and Neck Surgery , Nara Medical University , Nara , Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Kitahara
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D007758:Ear, Inner / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D055815:Young Adult
keywords: Age-related difference; endolymphatic space; fusing image; normal value; quantitative measurement