| 摘要 |
PURPOSE:To obtain a good re-constituted image while suppressing side lobe, by taking convolution between the hologram signal obtained from a receiving wave and one obtained by multiplying kernel by window function having a wave form gentle in the slope thereof. CONSTITUTION:A scanning controller 14 controls a pulser 13 according to the indication from a computer CU21 and drives a probe to a living body 12 while cos hologram data and sin hologram data obtained by one emission of ultrasonic waves are respectively stored in memories 19, 20 and, thereafter, written in image memory 22. In the next step, the kernel data corresponding to the hologram data read from the memory 22 and converted to a complex number thereby while kernel is multiplied by window function having a wave form gentle in the skirt thereof and convolution integration with kernel multiplied by each hologram and window function is performed and the calculated result is accumulated in output buffer memory 23 to be displayed on TV monitor 26. |
