公开(公告)号：US20170150946A1

公开(公告)日：2017-06-01

申请号：US15050584

申请日：2016-02-23

Applicant: SII Semiconductor Corporation

Inventor： Hiroyasu YOSHIZAWA ,  Satoshi HANAZAWA ,  Tatsuya ODAWARA ,  Na LI

IPC: A61B8/00 ,  A61B8/08

CPC classification number: A61B8/4494 ,  A61B8/5207 ,  B06B1/0215 ,  B06B2201/76

Abstract: A transmission circuit for ultrasonic diagnosis includes a delay processing circuit that delays a transmission signal pattern and an operational circuit that calculates a delay time. A transmission timing for supplying the transmission signal pattern to a plurality of piezo electric elements corresponding to a plurality of channels is approximated by a multi-dimensional polynomial with locations of the plurality of piezo electric elements being variables so that the transmission timing becomes linear or arc-like. Coefficients in the multi-dimensional polynomial are supplied to the transmission circuit for ultrasonic diagnosis. The delay time in the delay processing circuit is determined by a first coefficient. The operational circuit calculates the delay time based on a second coefficient. The transmission signal pattern is supplied to the plurality of piezo electric elements at a transmission timing including the delay time according to the first coefficient and the delay time according to the second coefficient.