Ultrasound enhancement is the increase in reflection amplitude from objects that lie behind a weakly attenuating structure. Contrast agent particles enhance the reflectivity of blood.
The enhancement artifact may occur in structures below a cyst.

Enhancement artifacts occur if decreasing of the echo amplitude is not equal with penetration depth caused by inhomogeneous tissue layers and fluids like cysts or air-filled regions. The enhancement artifact appears as a hyperintense (hyperechoic) signal. The attenuation of the ultrasound wave in fluids is much lower as the attenuation in other tissues, therefore tissues distal to fluid are enhanced. Artificial enhancement may also be found distal to a homogeneous solid tumor surrounded by adipose tissue, due to the comparatively high attenuation in fat.

See also Boundary Layer, and Half-Value Layer.

Same as Dwell Time or Packet Size.

From Philips Medical Systems;
'The Philips EnVisor system is a new class of ultrasound system, offering a rich combination of advanced performance, thoughtful ergonomics and elegant data management, all at a very achievable price point.'

Specifications for this system will be available soon.

From Philips Medical Systems;
'The EnVisor C is a new class of ultrasound system, offering a rich combination of advanced performance, thoughtful ergonomics and elegant data management, all at a very achievable price point.
Based upon our uniquely powerful heritage that combines the Agilent/Hewlett-Packard SONOS tradition with ATL's HDI technology, the EnVisor C system features a design architecture unprecedented in the evolution of ultrasound. From the ground up and inside out, the EnVisor C system is built to make your work easier, more efficient and more productive.'

Specifications for this system will be available soon.