| 摘要 |
An arrangement for effecting ultrasonic-echo encephalography, including at least two ultrasonic heads, as well as a recording arrangement for the ultrasonic waves which are received from the skull of a patient, and having at least one marking device associated therewith for marking the position of the theoretical median echo. The marking arrangement incorporates a time measurement element for determining the transit time of the ultrasonic wave through the skull portion being examined by means of the sound-penetrating operation which, after switching over to a reflecting operation, so controls an impulse generator in that the latter, periodically in beat with the ultrasonic radiation, and delayed with respect to the timepoint of the ultrasonic entry into the skull examination area by the amount of the previously determined skull transit time, as to produce a marking impulse at the recording arrangement. |
