| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic signal processor which can avoid quality deterioration of a decoded signal while suppressing increase in a memory scale.SOLUTION: Former half decoder parts 200i1, i2, i3.... convolute impulse response waveforms with respect to each of a plurality of output signals outputted from a plurality of vibration elements constituting a vibration element array of an ultrasonic probe 102, and change a filter coefficient of portion being a time side lobe every time a transmission event occurs, for convolution of the impulse response waveforms. A latter half decoder part 201 stores a reception beam signal outputted from a reception beam former 131 in a memory in correspondence with one transmission event, after that, when the new reception beam signal is outputted, performs correlation computing between the new reception beam signal and the preceding reception beam signal stored in the memory. |
