| 摘要 |
PROBLEM TO BE SOLVED: To provide a miniaturized and inexpensive ultrasonic diagnosis apparatus, capable of easily avoiding the reduction of sensitivity in a mode of high transmission voltage by appropriately controlling prescribed transmission voltage without excess or deficiency relative to the driving waveform variable according to modes. SOLUTION: A thinning control part 5 makes a transmission stopping part 4 transmit signals from whole channels without stopping transmission in a B mode with high transmission voltage and performs the thinning control in a D mode with low transmission voltage and in a two-dimensional doppler mode. As a result, the transmission power is controlled even if the transmission voltage in the latter mode is increased, and the transmission voltage in the B mode can be increased as well. COPYRIGHT: (C)2005,JPO&NCIPI |
