Ultrasonic diagnostic device and delay data generation method
A technology of a diagnostic device and a data generator, applied in the direction of echo tomography, etc., can solve the problems that have not been raised
Active Publication Date: 2020-12-25
HITACHI HEALTHCARE MFG LTD
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Problems solved by technology
The technique of independently generating the delay data corresponding to the outbound journey and the delay data corresponding to the return journey, and the technology of sharing the delay data thus generated have not yet been proposed.
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no. 2 approach
[0087] Initially, use Image 6 The deviation of the transmission / reception sensitivity peak from the reception focus and how to deal with it will be described. Image 6 The content of the premise is based on electronic sector scanning, but the ideas explained below can also be applied to other scanning methods.
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In the present invention, a forward time arithmetic circuit computes forward delay data that corresponds to a forward path from a transmission reference point to a reception focus. A backward time arithmetic circuit computes backward delay data that corresponds to a backward path from the reception focus to reception vibration elements for each reception vibration element. An adder generates delay data by adding the forward delay data and the backward delay data. The forward delay data is shared among a plurality of reception elements. The backward delay data is shared among a plurality of transmission beams for each reception element in a case where a virtual sound source method is applied.
Description
technical field [0001] The present invention relates to an ultrasonic diagnostic apparatus and a delay data generation method, and particularly relates to generation of delay data for delay processing performed by a reception beamformer. Background technique [0002] The receiving beam former (Receiving Beam Former) of an ultrasonic diagnostic apparatus (Ultrasonic Diagnostic Apparatus) is a circuit that applies phase modulation and addition processing ( Aligning and Summing Processing), thereby generating beam data equivalent to the receiving beam. The phasing addition process is a process of performing delay processing on a plurality of received signals to align the phases of a plurality of received signals in order to form a receiving focus, and then adding them, which may also be called delayed addition (Delayed Addition). and Sum(DAS)). The phasing and addition processing is roughly divided into delay processing and addition processing. [0003] Generally, a receptio...
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IPC IPC(8): A61B8/14
CPCA61B8/14
Inventor 久津将则栗原浩
Owner HITACHI HEALTHCARE MFG LTD