An ultrasonic apparatus for medical examination using ultrasonic waves, wherein - the ultrasonic apparatus comprises a movable transducer probe which can be positioned on a body of a patient and includes a transducer array of electroacoustic transducers for transmitting ultrasonic signals into the body and receiving as analog raw data ultrasonic echoes of the transmitted ultrasonic signals; - the transducer probe comprises an analog-to-digital converter which is configured to generate digital raw data in dependence on the received analog raw data, wherein the digital raw data comprise measurement data sets for temporally consecutive measurement time intervals, wherein a respective measurement data set comprises ultrasonic echoes from a tissue sector of the body, which result from a transmitting operation of one or more ultrasonic signals by at least one transducer in transmitting mode, as samples for sampling instants of the respective measurement time interval for a plurality of receiving channels from, respectively, at least one transducer in receiving mode; - the transducer probe is coupled via a digital data interface to a separate computer device not belonging to the transducer probe and is configured to stream the digital raw data via the digital data interface; - the computer device comprises a raw data buffer memory in which the respective measurement data sets of the digital raw data are buffered; - the computer device is configured to carry out a respective digital beamforming for the buffered measurement data sets by time-delayed addition of samples, in order to determine image values for a plurality of tissue locations at different tissue depths and with several tissue locations for each tissue depth, and thereby to obtain a reconstructed image of the tissue sector, and to generate, based on the reconstructed images, an image stream of consecutive reconstructed images or of images calculated therefrom with a predetermined image refresh rate and to supply it to a display means which reproduces the image stream. - the ultrasonic apparatus comprises a movable transducer probe which can be positioned on a body of a patient and includes a transducer array of electroacoustic transducers for transmitting ultrasonic signals into the body and receiving as analog raw data ultrasonic echoes of the transmitted ultrasonic signals; - the transducer probe comprises an analog-to-digital converter which is configured to generate digital raw data in dependence on the received analog raw data, wherein the digital raw data comprise measurement data sets for temporally consecutive measurement time intervals, wherein a respective measurement data set comprises ultrasonic echoes from a tissue sector of the body, which result from a transmitting operation of one or more ultrasonic signals by at least one transducer in transmitting mode, as samples for sampling instants of the respective measurement time interval for a plurality of receiving channels from, respectively, at least one transducer in receiving mode; - the transducer probe is coupled via a digital data interface to a separate computer device not belonging to the transducer probe and is configured to stream the digital raw data via the digital data interface; - the computer device comprises a raw data buffer memory in which the respective measurement data sets of the digital raw data are buffered; - the computer device is configured to carry out a respective digital beamforming for the buffered measurement data sets by time-delayed addition of samples, in order to determine image values for a plurality of tissue locations at different tissue depths and with several tissue locations for each tissue depth, and thereby to obtain a reconstructed image of the tissue sector, and to generate, based on the reconstructed images, an image stream of consecutive reconstructed images or of images calculated therefrom with a predetermined image refresh rate and to supply it to a display means which reproduces the image stream.