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Reliability of the ABC/2 Method in Determining Acute Infarct Volume.
MedLine Citation:
PMID:  21447023     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND AND PURPOSE: Infarct volume is used as a surrogate outcome measure in clinical trials of therapies for acute ischemic stroke. ABC/2 is a fast volumetric method, but its accuracy remains to be determined. We aimed to study the accuracy and reproducibility of ABC/2 in determining acute infarct volume with diffusion-weighted imaging. METHODS: We studied 86 consecutive patients with acute ischemic stroke. Three blinded observers determined volume with the ABC/2 method, and the results were compared with those of the manual planimetric method. RESULTS: The ABC/2 technique overestimated infarct volume by a median false increase (variable ABC/2 volume minus planimetric volume) of 7.33 cm(3) (1.29, 22.170, representing a 162.56% increase over the value of the gold standard (variable ABC/2 volume over planimetric volume) (121.70, 248.52). In each method, the interrater reliability was excellent: the intraclass correlations were .992 and .985 for the ABC/2 technique and planimetric method, respectively. CONCLUSIONS: ABC/2 is volumetric method with clinical value but it consistently overestimates the real infarct volume.
Authors:
Salvador Pedraza; Josep Puig; Gerard Blasco; Josep Daunis-I-Estadella; Imma Boada; Anton Bardera; Mar Castellanos; Joaquín Serena
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-29
Journal Detail:
Title:  Journal of neuroimaging : official journal of the American Society of Neuroimaging     Volume:  -     ISSN:  1552-6569     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9102705     Medline TA:  J Neuroimaging     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 by the American Society of Neuroimaging.
Affiliation:
Department of Radiology (IDI), Girona Biomedical Research Institute (IDIBGI), Hospital Universitari de Girona Dr Josep Trueta, Universitat de Girona, Girona, Spain (SP, JP, GB); and Department of Informatics and Applied Mathematics, Universitat de Girona (JDE), Institut d'Informatica i Aplicacions, Universitat de Girona (IB, AB), Department of Neurology, Hospital Universitari Dr Josep Trueta (MC, JS), Programa de Doctorat, Departament de Medicina, Universitat Autonoma de Barcelona, Barcelona, Spain (SP).
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