Ultrasonic locating device for a lithotriptor

摘要

An ultrasonic locating device for a lithotripter is described, consisting of at least one locating transducer (2) which is assigned to a therapy transducer (1) and can be displaced axially with respect to the focus thereof and has several focal areas, of a position sensor (4) which generates a signal representing the distance of the head of the locating transducer (2) from the therapy transducer focus (9), of a computer (5), of a monitor (6) on which a target cross representing the therapy transducer focus (9) can be displayed, and of a transmit/receive electronics unit (8) which can be controlled from the computer (5). …??In order to generate a continuously optimal image of the concretion to be destroyed, the computer controls via the transmit/receive electronics unit (8), as a function of the signal from the position sensor (4), that focal area of the locating transducer (2) which, at the given instantaneous distance of the head from the therapy transducer focus (9), lies at all times in the area thereof. The computer (5) additionally generates a signal plotting the target cross on the monitor (6) in accordance with the signal from the position sensor (4), which signal is conveyed to the monitor (6) so that, if appropriate, the image of the concretion on the monitor (6) lies in the target cross at each axial position of the locating transducer (2). …IMAGE…