Ultrasound system and clutter filtering method thereof

An ultrasound system comprising:

• an ultrasound transceiver configured to transmit an ultrasound signal to an object and receive a reflection signal reflected from the object;
• a controller configured to perform a singular value decomposition (SVD) on a plurality of Doppler signals comprising the reflection signal, identify a tissue region and a flow region of the object according to a result of performing the SVD, determine a cutoff frequency of the tissue region by estimating a frequency of the Doppler signal corresponding to the tissue region using an autocorrelation method, multiplying the estimated frequency by a preset coefficient, and adding a result of the multiplying to the estimated frequency and determine a cutoff frequency of the flow region by applying the result of performing the SVD to the flow region, and perform clutter filtering on the tissue region and the flow region by using the determined cutoff frequency of the tissue region and the flow region;
• and
• a display unit configured to display a signal on which the clutter filtering is performed, as an image.

An ultrasound apparatus comprising:

• an ultrasound transceiver configured to transmit an ultrasound signal to an object and receive a reflection signal reflected from the object;
• a controller configured to identify, within the object, a flow region where flow exists and a tissue region where flow does not exist according to the reflection signal and a result of performing a singular value decomposition (SVD), select different clutter eliminating filters to eliminate clutter in the tissue region by estimating a frequency of a Doppler signal corresponding to the tissue region using an autocorrelation method, multiplying the estimated frequency by a preset coefficient, and adding a result of the multiplying to the estimated frequency, and in the flow region by applying the result of performing the singular value decomposition (SVD) to the flow region, and perform clutter filtering on a signal comprising the flow region and the tissue region using the selected clutter eliminating filters to output a clutter filtered signal;
• and
• a display configured to display the clutter filtered signal as an image.