Micro Bubbles

Micro bubbles is a new form of ultrasound that is capable of tracking cancer and metastases. Small gas bubbles are injected into a vein. The bubbles circulate through the body and collect in suspicious areas. The new ultrasound allows the detection of these bubbles quickly and safely. The bubbles do eventually disappear when the gas within dissolves into the blood. The article goes on about this new method very interesting.

http://www.azonano.com/news.asp?newsID=1321