title: In vivo diffusion-weighted MRI using perfluorinated gases: ADC comparison between healthy and elastase-treated rat lungs.
abstract: OBJECTIVE
  MRI with perfluorinated gases has been shown as an alternative to hyperpolarized gases to image both microstructure and gas diffusivity in the lung. The aim of this study was to measure diffusion restriction of C2 F6 in rat lungs and to compare the different levels of restriction between healthy and emphysematous tissue.
  
  
  METHODS
  For this purpose, two groups of rats-healthy and mono-lobar elastase-induced animals-were measured. While being ventilated with a mixture of C2 F6 and oxygen four diffusion weighted 19F-images where acquired for each animal and corresponding ADC-maps were calculated.
  
  
  RESULTS
  No significant apparent diffusion coefficient (ADC) differences were found between healthy lungs; however, the elastase treated lungs showed a significant increase in ADC.
  
  
  CONCLUSIONS
  These results demonstrate that ADC measurements with C2 F6 are sensitive to the microstructure of rat lungs showing that the diffusion of this gas is limited to different levels in healthy and in emphysematous tissue.
authors: Boehringer Ingelheim Pharma GmbH & Co. KG, Target Discovery Research, in-vivo imaging laboratory, Biberach an der Riss, Germany.
authors: L
authors: L
authors: Carrero-González
authors: T
authors: T
authors: Kaulisch
authors: D
authors: D
authors: Stiller
mesh_terms: D000818:Animals; D003287:Contrast Media; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods*; D004646:Emphysema / Q000139:chemically induced / Q000473:pathology*; D017611:Fluorine Compounds; D005740:Gases; D008168:Lung / Q000187:drug effects; D008297:Male; D010196:Pancreatic Elastase; D051381:Rats; D017208:Rats, Wistar; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D003287:Contrast Media; D017611:Fluorine Compounds; D005740:Gases; D010196:Pancreatic Elastase
keywords: ADC; C2F6; elastase; emphysema; in vivo small animals imaging