THREE DIMENSIONAL PULSED WAVE SPECTRUM ULTRASONIC DIAGNOSTIC APPARATUS AND THREE DIMENSIONAL PULSED WAVE SPECTRUM DATA GENERATION METHOD

1 . A three-dimensional (3D) pulsed wave (PW) spectrum ultrasonic diagnostic apparatus, the apparatus comprising:

a transmitting/receiving unit to transmit a first PW Doppler ultrasonic signal and a second PW Doppler ultrasonic signal to a target object by using a two dimensional (2D) array probe, and to receive a first PW Doppler response signal corresponding to the first PW Doppler ultrasonic signal and a second PW Doppler response signal corresponding to the second PW Doppler ultrasonic signal;

a forming unit to form a sample gate in a 3D format by using the received first PW Doppler response signal and the received second PW Doppler response signal; and

a generating unit to generate 3D PW spectrum data by using the formed 3D sample gate.

2 . The apparatus of claim 1 , wherein the transmitting/receiving unit receives a plurality of first PW Doppler response signals related to an X-axis section in response to the first PW Doppler ultrasonic signal, and receives a plurality of second Doppler response signals related to a Y-axis section in response to the second PW Doppler ultrasonic signal.

3 . The apparatus of claim 2 , wherein the forming unit forms the sample gate having a plurality of sections by using the plurality of first Doppler response signals and the plurality of second Doppler response signals to form a cube sample gate.

4 . The apparatus of claim 1 , wherein the generating unit generates the 3D PW spectrum data with respect to the target object, an amount of the 3D PW spectrum data being equivalent to a width of the 3D sample gate.

5 . A method of generating 3D PW spectrum data, the method comprising:

transmitting a first PW Doppler ultrasonic signal and a second PW Doppler ultrasonic signal to a target object by using a 2D array probe;

receiving, from the target object, a first PW Doppler response signal corresponding to the first PW Doppler ultrasonic signal and a second PW Doppler response signal corresponding to a second PW Doppler ultrasonic signal;

forming a sample gate in a 3D format by using the received first PW Doppler response signal and the received second PW Doppler response signal; and

generating 3D PW spectrum data by using the formed 3D sample gate.

6 . The method of claim 5 , wherein the receiving comprises:

receiving a plurality of first PW Doppler response signals related to an X-axis section in response to the first PW Doppler ultrasonic signal; and

receiving a plurality of second PW Doppler response signals related to a Y-axis section in response to the second PW Doppler ultrasonic signal.

7 . The method of claim 6 , wherein:

the forming comprises:

forming a cube sample gate by forming the sample gate having a plurality of sections by using the plurality of first PW Doppler response signals and the plurality of second PW Doppler response signals, and

the generating comprises:

generating the 3D PW spectrum data with respect to the target object, an amount of the 3D PW spectrum data being equivalent to a width of the 3D sample gate.