| 摘要 |
PROBLEM TO BE SOLVED: To improve the resolution of ultrasonic image to be provided by keeping accuracy for the delay correcting operation of received signal almost constant without depending on depth in an ultrasonic diagnostic device. SOLUTION: A correcting operation range designating circuit 17 is provided for changing the range of ultrasonic data to be used for the delay correcting operation of received signals corresponding to the depth concerning a delay correcting means 5 for inputting the received signals from delay circuits 31 -3n and correcting the delay time to be applied to these received signals by finding delay difference based on biological nonuniformity. Thus, accuracy for the delay correcting operation of these received signals is kept almost constant without depending on the depth, and the resolution of ultrasonic image to be provided can be improved. |
