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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.
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