From ESAOTE S.p.A.;
'Megas GPX means all digital, all configurations, all probes feature a high standard level of quality and extended versatility.
Based on digital beamformer technology, Megas GPX's functions can be easily updated to explore the new frontiers of the ultrasound world and give you the most flexible and powerful tool to make even the most difficult diagnoses.'

The multiple frame trigger adjusts the acquisition of a series of consecutive frames, usually with ECG triggering. Multiple frame triggers are used in harmonic power Doppler modes to identify motion artifacts in contrast enhanced Doppler imaging.

Non-linear imaging is used to detect primary non-linear components of the received echo. Non-linear methods like harmonic imaging and pulse inversion imaging are designed to detect ultrasound contrast agents.

See also Contrast Pulse Sequencing, and Power Modulation.

The propagation of high amplitude ultrasound waves is inadequate described by a linear wave equation. Non-linear propagation is to expect if the power levels are high enough to make non-linear effects significant. A non-linear propagation results in the distortion of the transmitted waveforms, resulting in the generation of harmonics of the initial frequency components transmitted by the transducer.
In the near field of ultrasound probes, the occurring diffraction and focusing effects make this process complex. The distortion of a wavefront propagating in a medium in which the compressional phase moves slightly faster than the rarefactional phase, results is the conversion of some wave energy into higher harmonics of the fundamental frequency. The effect increases strongly with increasing wave amplitude.

Poiseulles law states that the flow rate in a long, straight tube with laminar flow is proportional to its length and viscosity and inversely proportional to the fourth power of its radius.

See also Proportionality Constant.