Focused ultrasound knife uses high-intensity focused ultrasound, that is, high energy ultrasound.

A<br/>piezoelectric crystal is used to produce the ultrasound waves. What<br/>kind of ultrasound is produced? () A: Pressure<br/>wave ultrasound B: Electrical<br/>wave ultrasound C: Sound<br/>wave ultrasound D: Simple<br/>ultrasound

Ultrasound<br/>molecular imaging is based on the specific acoustic properties of<br/>acoustically active ultrasound contrast agents, which can be<br/>sensitively imaged with regular ultrasound methods. ()

B ultrasound is applied to diagnose the disease by using the reflex law of ultrasound in different parts of the body tissue.

Ultrasound is quick for it is a non-invasive investigation- with no surgical procedure.

Acoustic ultrasound gel is applied to the skin to A: a) Allow good transmission of sound waves into the body. B: b) Lubricate the skin. C: c) Increase the amount of ultrasound scatter.

Ultrasound is used in lots of different cases, especially ____(怀孕).

The application scope of ultrasonic technology in obstetrics are（） A: prenatal diagnosis of fetal malformations B: genetic ultrasound C: intrauterine management of high-risk pregnancy D: interventional ultrasound and intrauterine therapy

During an ultrasound, some normal gel is applied on your skin.

9. Ultrasound can be used to locate tumors. A: True B: False