title: Effects of paramagnetic contrast agents on the gallbladder volume.
abstract: OBJECTIVE
  Iodinated contrast agents lead to contraction of the gallbladder. The purpose of this prospective study was to investigate whether the paramagnetic contrast agents used for magnetic resonance imaging (MRI) cause volume changes in gallbladder or not.
  
  
  METHODS
  The gallbladder volume changes were evaluated by ultrasound just before and 15 minutes after the imaging procedure in 10 patients without any paramagnetic contrast agent administration and 36 patients in whom paramagnetic contrast agents were administered during MRI. Gallbladder volume measurements before and 15 minutes after MRI were compared with each other.
  
  
  RESULTS
  The mean pre- and post-procedural gallbladder volumes in patients on paramagnetic contrast agents were 30.2 +/- 19.3 cm(3) and 27.8 +/- 13.5 cm(3), respectively. They were 31.8 +/- 15.0 cm(3) and 29.5 +/- 9.3 cm(3), respectively, in patients who were not administered any paramagnetic contrast agent. There were no statistically significant difference between groups, regarding pre- and post-MRI gallbladder volumes.
  
  
  CONCLUSIONS
  MRI, with or without paramagnetic contrast agents, does not lead to gallbladder volume contraction. In that regard, there appears to be no need to avoid ultrasound aimed to evaluate the gallbladder after MRI examinations.
authors.affiliation: Department of Radiology, Dicle University Faculty of Medicine, Diyarbakir, Turkey. hnazarog@dicle.edu
authors.forename: Hasan
authors.initials: H
authors.lastname: Nazaroğlu
authors.forename: Kaan
authors.initials: K
authors.lastname: Meriç
authors.forename: Cihan Akgül
authors.initials: CA
authors.lastname: Ozmen
authors.forename: Yaşar
authors.initials: Y
authors.lastname: Bükte
authors.forename: Hatice Oztürkmen
authors.initials: HO
authors.lastname: Akay
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D005704:Gallbladder / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011446:Prospective Studies; D012016:Reference Values; D014463:Ultrasonography; D055815:Young Adult
chemical_list: D003287:Contrast Media