[Volumetric determination of cerebral infarction in the acute phase using skull computed tomography without contrast: comparative study of 3 methods].
The determination of lesion volumes in acute cerebral Infarction (CI) has important prognostic and therapeutic implications. Three different methods -computerised technique, linear planimetry and the A.B.C/2 formula - were compared in 27 patients using non-contrast computerised tomography (CT) made at hospital admission (first 48 hours following symptom onset). Two independent observers performed the measurements. The Intra-class correlation coefficients (ICCs) were determined. The three methods exhibited high interrelation. There was a close correlation between the linear planimetry as well as the ABC/2 formula and the computerised method with ICCs of 0.94-0.95 and 0.835-0.90 respectively. Linear planimetry and the ABC/2 formula were also highly correlated, with ICCs between 0.97 and 0.99. In conclusion, the computerised method is probably the most accurate. Linear planimetry and the ABC/2 formula are also reliable, however. The A.B.C/2 formula should be applied routinely to CI volume determination based on its low cost and fast calculation.
Gómez-Mariño
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Setor de Estudos em Doenças Cerebrovasculares, Serviço de Neurologia Professor Sérgio Novis, Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
André
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Novis
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D000208:Acute Disease; D002544:Cerebral Infarction / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D015203:Reproducibility of Results; D014057:Tomography, X-Ray Computed / Q000379:methods*