The shock formation in a nonlinear ultrasound beam by solving KZK equation using frequency-domain numerical method is investigated.

通过用频域方法数值求解KZK方程； 以活塞声场为例，研究了非线性超声束的冲击波形成规律。

youdao

So phased array is an ideal applicator that can congregate ultrasound beam and shift the focus more flexibly, rapidly and accurately.

因此相控阵列能够更加灵活、准确而快速地实现多样化的焦点模式和焦点扫描控制，是非常理想的声束聚焦手段。

youdao

Show tissue velocity and displacement in the direction of the ultrasound beam with high temporal resolution, and also visualize short events.

显示组织速度和位移的高时空分辨率的方向，超声束，也可视短期的事件。

youdao

Part of the electronics creates a beam of ultrasound that is directed into the patient's flesh and, with luck, reflected back.

ECONOMIST: Medical technology

It invented a sophisticated device that emits sound waves in a lethally focused beam of energy but never proved that ultrasound provides long-term relief or is more effective than existing procedures.

FORBES: Not Hot Enough