Abstract: In an apparatus for ultrasonic diagnosis, an autocorrelation calculator 11 produces Doppler power data P, a shading portion extractor 21 extracts the left-side section of the profile of the ultrasonic image from the Doppler power data P, and a data value converter 22 converts the data value of the extracted shading portion into the data value for shading and converts the data values of remaining portions into a data value different from the data value for shading. The shaded ultrasonic image is visualized as a three-dimensional image so as to facilitate the diagnosis. Particularly, in ultrasonic images of Doppler power mode, blood vessels are visualized as three-dimensional images, and the viewer can identify even small blood vessels accurately.

Abstract: In a power Doppler ultrasonic blood flow display apparatus, according to a moving signal Z representing moving of a blood flow display region, display changing means comprising changers (77, 78) and a change controller (79) displays a B-mode image also to a blood flow display region (84) while the blood flow display region (84) is moved, and displays a blood flow image when the moving of the blood flow display region (84) is stopped. Consequently the B-mode image of the target can be easily caught even while the blood flow display region is moved.

Abstract: Method and apparatus for generating Doppler sounds, even when there are segmented Doppler modes, wherein I and Q components of a Doppler signal are respectively converted into left and right sound signals in accordance with Hilbert transformation, then, a segmented waveform, interposed between zero crossing points of the left and right sound signals, is take out so as to created a positive side segmented waveform, obtained by rendering the sign of the segmented waveform positive, and so as to create a negative side segmented waveform, obtained by rendering the sign of the segmented waveform negative, then, respective pairs of positive side segmented waveforms and negative side segmented waveforms of respective segmented waveforms are made continuous in order of appearance of the segmented waveforms so as to create double lengthened sound signals which are then joined to produce a continuous sound signal.

Abstract: An ultrasonic diagnostic method and apparatus are provided for enhancing real-time performance, enlarging visual field, and improving S/N ratio without sacrificing any of real-time performance, visual field and S/N ratio by field into two or more sections; generating sounding waves forming a main lobe and grating lobes to scan the sections of the visual field respectively by the main lobe and the grating lobes; separately and directively processing an echo wave received along the direction of the main lobe and echo waves received along the directions of the grating lobes to form images of the sections separately; and combining the images of the sections to display an image of the visual field.