| 摘要 |
PROBLEM TO BE SOLVED: To improve the synchronization accuracy in an ultrasonic diagnostic system for fetching images in synchronism with biological signals. SOLUTION: In a DSC(digital scanning converter) 32, three frame memories 34, 36 and 38 are provided. The frame memories 34, 36 and 38 are utilized in order and the write of data and the read of the data are performed. The write of the data is executed correspondingly to a transmission/reception frame rate and the read of the data is executed correspondingly to a display frame rate. At the time of writing the data, when R wave pulses are generated in the middle of the write of the data for an (n)-th frame, the same frame memory is utilized again and the write of the data for an (n+1)-th frame is performed. At the time of reading the data, in the case that the write of the data for the (n+1)-th frame is not completed yet at the point of time of completing the read of the data for the (n)-th frame, the data for the (n)-th frame are read again. |
