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AJNR - American Journal of Neuroradiology

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Comparison of Transcranial Color-Coded Duplex Sonography and Cranial CT Measurements for Determining Third Ventricle Midline Shift in Space-Occupying Stroke

Erwin Stolz^,a, Tibo Gerriets^a, Ingo Fiss^a, Sait S. Babacan^a, Günter Seidel^a and Manfred Kaps^a

^a From the Department of Neurology, University of Giessen (E.S., S.S.B.) and the Department of Neurology, University of Luebeck (T.G., I.F., G.S., M.K.), Germany.

View larger version (72K): [in a new window]   FIG 1. A, Axial transtemporal TCCS shows the third ventricle (a) as hyperechogenic double reflex, the pineal region (b), the hypoechogenic thalamus (c), and the contralateral scull (d). Arrow indicates the principle of the measurement of the distance from the center of the ultrasound beam to the middle of the third ventricle. Half the difference of this distance, measured from both sides, gives the sonographic MLD of the third ventricle. B, Schematic drawing illustrates the placement and angulation of the ultrasound transducer.

View larger version (16K): [in a new window]   FIG 2. Linear regression analysis of TCCS MLD (x-axis) measurements related to the cranial CT (CCT) MLD (y-axis) measurements (r = .93, SD = 0.89; P < .0001; n = 122)

View larger version (21K): [in a new window]   FIG 3. Bland-Altman diagram shows the mean of the TCCS/cranial CT (CCT) MLD measurement pairs (x-axis) related to the difference between the TCCS MLD (y-axis) and repective CCT