Siemens Aktiengesellschaft

Rudolf Rattmann

Richard Ernst Soldner

A line sweep magnetic deflection system is triggered to display ultrasonic echo impulses during line by line scanning of a body region. Each trigger impulse produces a nonlinear saw-tooth voltage waveform as a function of time which when converted to a corresponding current waveform in the deflection coil produces a constant line deflection velocity for accurate display of echo signals in spite of nonlinearities in the electron optics of the oscilloscope, for example. High gain differential amplifier means force the coil current to conform to the voltage waveform during active line trace, and deviations during retrace intervals cause the application of an overvoltage to the coil driver stage, blocking a normal operating supply voltage therefor, and rapidly driving the coil to its initial energy state, thereby enabling a higher line sweep frequency with consequent optimum display resolution.

Oscilloscope for the image display of sectional planes of a body

An ultrasonic applicator including a parabolic reflector for reflecting ultrasonic beam energy for ultrasonic sectional scanning particularly for medical diagnostic purposes, has its image registering system compensated for the variable sweep velocity of the ultrasonic beam energy within the body region under examination by the provision of a rotary mark carrier with a series of angularly offset marks of variable spacing such that as the mark carrier rotates at a constant rate in synchronism with the rotary ultrasonic transducer head, the marks are scanned at a relatively rapid rate as the ultrasonic impulses are reflected at the border regions of the parabola and are scanned at a progressively slower rate during transducing via points progressively closer to the central region of the parabola.

Ultrasonic imaging apparatus operating according to the impulse-echo

An ultra sound examining device operating according to the impulse echo process and used for medical purposes comprises an ultra sound sending-receiving system the sender of which transmits ultra sound impulses in predetermined time intervals into the object being examined through a precursor stretch connected in front of the system, for example, water precursor stretch. There is also an echo impulse representing device operated depending upon the transmitted impulses which represents echo impulses of each transmitted impulse received by the receiver one after the other corresponding to the time sequence of their appearance. The invention is particularly characterized in that the time interval between two succesive transmitted impulses of the ultra sound sender has a value which is smaller than the sum of the precursor time of the ultra sound impulses in the precursor stretch and the representation time of the echo impulses on the representing device. However, even the smallest value is not less than the representation time.

Growing community of inventors

Herzogenaurach, Germany

Rudolf Rattmann