| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic Doppler diagnostic device which simultaneously executes the measurement of blood velocities relating to a plurality of areas distributed to the two-dimensional lane within an organism at different reference frequencies. SOLUTION: This ultrasonic Doppler diagnostic device has transmission trigger pulse signal generating means (21, 31a and 31b) which simultaneously form transmission trigger pulse signals of different frequencies, transmission delay control means (32a and 32b) which independently delay and control the respective transmission trigger pulse signals, transmitting means (33a, 33b and 34) which simultaneously transmit the transmission signals of high voltages of the different frequencies in superposition, receiving means (51) which receives ultrasonic echoes, band-pass filters (52a and 52b) which vary in pass frequency bands, reception delay control means (53a and 53b) which independently delay and control the respective reception signals varying in the frequency bands, phase detecting means (61a, 54a and 54b) which detect phases at the reference frequencies different from each other and blood velocity computing means (71) which computes the blood velocities from the detection signals. |
