title: [Perfusion-MRI in cerebral infarct].
abstract: OBJECTIVE
  To investigate the hemodynamic changes in patients with acute cerebral stroke by perfusion MRI.
  
  
  METHODS
  In 12 patients with acute stroke in the territory of the middle cerebral artery, perfusion MRI was performed. Peak time, mean transit time, regional cerebral blood volume and regional cerebral blood flow were calculated in the infarction, the peri-infarction area and the contralateral hemisphere.
  
  
  RESULTS
  In the infarction the mean blood flow was 29 ml/100 g/min, compared to about 40 ml/100 g/min in the peri-infarction area and the contralateral hemisphere. In two patients increased cortical blood flow was found in the infarction due to luxury perfusion. The cerebral blood volume was reduced in the infarction, but significantly increased, to 7.3 ml/100 g, in the peri-infarction tissue.
  
  
  CONCLUSIONS
  Perfusion MRI allows one to differentiate various patterns of perfusion disorders in patients with acute cerebral stroke. The resulting data may be helpful in describing the pathophysiologic mechanisms of compensation.
authors.affiliation: Abteilung für Neuroradiologie, Universität des Saarlandes.
authors.forename: T
authors.initials: T
authors.lastname: Hagen
authors.forename: K
authors.initials: K
authors.lastname: Bartylla
authors.forename: M
authors.initials: M
authors.lastname: Stoll
authors.forename: U
authors.initials: U
authors.lastname: Piepgras
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002544:Cerebral Infarction / Q000175:diagnosis*; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged
vernacular_title: MR-Perfusionsuntersuchung beim Hirninfarkt.