Ultrasound diagnostic apparatus

An ultrasound diagnostic apparatus comprising:

• a transducer array including a plurality of transducers that are successive in an electronic scanning direction;
• a controller that controls operation of the transducer array to successively form a plurality of beam scanning planes including a first beam scanning plane and a second beam scanning plane;
• and
• a synthesizer that synthesizes a plurality of items of frame data that are obtained through formation of the plurality of beam scanning planes,
• wherein the first beam scanning plane is composed of a plurality of first beams that are successive in the electronic scanning direction,
• wherein the deflection angle of the plurality of first beams increases continuously toward a negative side from a first end to a second end in the electronic scanning direction,
• wherein the second beam scanning plane is composed of a plurality of second beams that are successive in the electronic scanning direction, and
• wherein the deflection angle of the plurality of second beams increases continuously toward a positive side from the second end to the first end.