title: [MRI with fat suppression in the visualization of wall hematoma in spontaneous dissection of the internal carotid artery].
abstract: OBJECTIVE
  Comparison of different MR-examination techniques for the diagnosis of acute spontaneous internal carotid artery dissection.
  
  
  METHODS
  13 patients (age range 23-59 years) with symptomatic spontaneous dissection of the internal carotid artery were examined. The MRI protocol contained a transverse spin echo sequence, a time-of-flight MR-angiography and a coronal fat suppressed T1-weighted sequence. The earliest examination was performed three days after symptom onset. Follow-up extended up to 30 months. We compared the three different sequences to find out the one that demonstrated the hematoma best.
  
  
  RESULTS
  MR-angiography shows a narrowing of the vessel diameter in early examinations. During the subacute stage methemoglobin can obscure this finding. From the third day on fat suppressed T1-weighted images showed a hyperintense hematoma that strongly contrasted to the surrounding fatty tissue. Fat suppressed images showed a hyperintense hematoma up to 10 months after symptom onset while MRA and spin echo sequences did not.
  
  
  CONCLUSIONS
  Fat suppressed T1-weighted images are superior in showing vessel wall hematoma and should thus be used in the standard MR-protocol for spontaneous internal carotid artery dissection.
authors.affiliation: Abteilung Neuroradiologie, Neurologischen Klinik, Universitätsklinikum Heidelberg. jochen_fiebach@med.uni-heidelberg.de
authors.forename: J
authors.initials: J
authors.lastname: Fiebach
authors.forename: T
authors.initials: T
authors.lastname: Brandt
authors.forename: M
authors.initials: M
authors.lastname: Knauth
authors.forename: O
authors.initials: O
authors.lastname: Jansen
mesh_terms: D000273:Adipose Tissue; D000328:Adult; D020215:Carotid Artery, Internal, Dissection / Q000175:diagnosis*; D005260:Female; D006406:Hematoma / Q000175:diagnosis*; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
vernacular_title: MRT mit Fettsuppression zur Darstellung des Wandhämatoms bei spontaner Dissektion der A. carotis interna.