| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To separate clutter components from blood flow components even when ultrasonic waves are transmitted in a wide band. <P>SOLUTION: A color Doppler ultrasonic diagnosis apparatus includes: an ultrasonic probe 1; a transmission circuit 2 configured to transmit an ultrasonic wave to an object via the ultrasonic probe; a reception circuit 4 configured to receive an ultrasonic wave from an object via the ultrasonic probe to perform quadrature phase detection; a filter unit 7 configured to perform first orthogonal transformation for an output from the quadrature phase detection unit in a depth direction, perform second orthogonal transformation for a result obtained by the first orthogonal transformation in a Doppler direction, apply a two-dimensional filter to obtained frequency data to extract a blood flow component from the frequency data, and sequentially perform inverse transformation of the second orthogonal transformation and inverse transformation of the first orthogonal transformation for an output from the two-dimensional filter; and a blood flow component information calculation unit 9 configured to calculate blood flow component information based on an output from the filter unit. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
