Interobserver agreement in the assessment of cerebral atrophy on CT using bicaudate and sylvian-fissure ratios.
To assess the interobserver variability of cerebral-atrophy measures on CT, three investigators measured the bicaudate ratio (BCR) and the sylvian-fissure ratio (SFR) on 20 CT studies of patients with ischaemic stroke. The intraclass correlation coefficient of BCR measurements was 0.82 [95% confidence interval (CI) 0.75-0.94], and that of SFR measurements 0.69 (95% CI 0.57-0.89). The range of pairwise-calculated Pearson correlation coefficients was smaller for measurement of the BCR (0.89-0.92) than for the SFR measurements (0.66-0.84).
van Zagten
M
M
University Hospital Maastricht, Department of Neurology, The Netherlands.
Kessels
F
F
Boiten
J
J
Lodder
J
J
D001284:Atrophy; D001921:Brain / Q000000981:diagnostic imaging* / Q000473:pathology; D001929:Brain Edema / Q000000981:diagnostic imaging; D002545:Brain Ischemia / Q000000981:diagnostic imaging*; D002421:Caudate Nucleus / Q000000981:diagnostic imaging* / Q000473:pathology; D002531:Cerebellum / Q000098:blood supply; D002544:Cerebral Infarction / Q000000981:diagnostic imaging; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging; D016001:Confidence Intervals; D006801:Humans; D015588:Observer Variation; D011446:Prospective Studies; D015203:Reproducibility of Results; D012688:Septum Pellucidum / Q000000981:diagnostic imaging; D013702:Temporal Lobe / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed