title: Magnetic resonance imaging in the diagnosis of stroke.
abstract: BACKGROUND
  The high morbidity and mortality of strokes result in enormous costs to our society. In the last decade advanced imaging techniques with high sensitivity in the diagnosis of acute stroke have been developed. Acute thrombolytic treatment beyond 3 h of acute stroke duration requires the demonstration of penumbra or 'tissue at risk'. However, the utility of the mismatch concept to identify the penumbra area is controversial.
  
  
  OBJECTIVE
  The aim is to describe the main features of acute stroke on magnetic resonance imaging.
  
  
  METHODS
  Information was obtained from a search of the PubMed and Medline databases (keywords: imaging, stroke, diagnosis and infarct) for articles published from 1997.
  
  
  CONCLUSIONS
  To conclude, new imaging biomarkers of relevant mismatch, hemorrhagic transformation and worse outcome should be developed in the future.
authors.affiliation: Hospital Universitario Dr Josep Trueta, Centro de RM, IDI, Servicio de Radiología, Av de Francia sn, 17007, Girona, Spain +34 972 486 020 ; +34 972 483 085 ; spedraza@retE-mail.es.
authors.forename: Salvador
authors.initials: S
authors.lastname: Pedraza
authors.forename: Josep
authors.initials: J
authors.lastname: Puig
authors.forename: Sebastian
authors.initials: S
authors.lastname: Remollo
authors.forename: Ana
authors.initials: A
authors.lastname: Quiles
authors.forename: Eva
authors.initials: E
authors.lastname: Gomez1
authors.forename: Gemma
authors.initials: G
authors.lastname: Laguillo
authors.forename: Gerard
authors.initials: G
authors.lastname: Blasco