for Journals by Title or ISSN
for Articles by Keywords
help
Followed Journals
Journal you Follow: 0
 
Sign Up to follow journals, search in your chosen journals and, optionally, receive Email Alerts when new issues of your Followed Jurnals are published.
Already have an account? Sign In to see the journals you follow.
Acta Radiologica Short Reports    Journal TOC RSS feeds Export to Zotero Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 2047-9816 - ISSN (Online) 2047-9816
     Published by Sage Publications Homepage  [700 journals]
  • Perfusion computed tomography relative threshold values in definition of acute stroke lesions
    • Authors: Maija, R; Gaida, K, Karlis, K, Evija, M.
      Pages: 2047981613 - 2047981613
      Abstract: Background Perfusion computed tomography (CT) is a relatively new technique that allows fast evaluation of cerebral hemodynamics by providing perfusion maps and gives confirmation of perfusion deficits in ischemic areas. Some controversies exist regarding accuracy of quantitative detection of tissue viability: penumbra (tissue at risk) or core (necrosis). Purpose To define brain tissue viability grade on the basis of the perfusion CT parameters in acute stroke patients. Material and Methods A multimodal CT imaging protocol; unenhanced CT of the brain, CT angiography of head and neck blood vessels, followed by brain perfusion CT and 24 h follow-up brain CT was performed. Perfusion deficits were detected first visually, with subsequent manual quantitative and relative measurements in affected and contra-lateral hemisphere in 87 acute stroke patients. Results Visual perfusion deficit on perfusion CT images was found in 78 cases (38 women, 40 men; mean age, 30–84 years). Penumbra lesions (n = 49) and core lesions (n = 42) were detected by increased mean transit time (MTT) on perfusion CT maps in comparison to contra-lateral hemispheres. Cerebral blood volume (CBV) mean values in the penumbra group were increased in the penumbra group and decreased in the core group. Cerebral blood flow (CBF) values were decreased in penumbra and markedly decreased in core lesion. Conclusion Perfusion CT measurements are reliable in estimation of penumbra and core lesions in acute stroke patients, if relative threshold values are used. The most accurate parameter of hypoperfusion is increased MTT above 190%. Relative threshold values for irreversible lesion are CBF
      PubDate: 2013-04-01T00:00:00-07:00
      DOI: 10.1177/2047981613486099|hwp:resource-id:sparr;2/3/2047981613486099
      Issue No: Vol. 2, No. 3 (2013)
       
 
Proudly sponsored by
LM Information Delivery
One of Europe's leading subscription and information management providers offering cost-efficient solutions for academic and research libraries.
SUNCAT is the largest freely available source of information about serials holdings in the UK. Researchers are able to locate serials held in 85 UK research libraries.