Haskell's work has been the basis for much of the current surface wave inversion theory.

Surface wave inversion is also non-invasive as well as cost effective.

Surface wave inversion is becoming a valuable tool in evaluating the near subsurface.

A less common variant is biphasic T wave inversions in the same leads.

For one, surface wave inversion readily images low-velocity zones.

There can also be ST depression or T wave inversion, these do not indicate toxicity.

The resolution of the surface wave inversion method is not nearly as resolved as a seismic collection done in a wellbore.

After the dispersion curve has been generated, a surface wave inversion process is performed to calculate the subsurface elastic properties.

The work by early earthquake seismologists to extract substantial information from surface wave data was the basis for surface wave inversion theory.

The high frequency Rayleigh wave inversion performed by Xia et al. (1999) analyzed the earth using Knopoff's method.

The pharmacological actions of digoxin usually result in electrocardiogram changes, including ST depression or T wave inversion, which do not indicate toxicity.

Surface wave inversion is the method by which elastic properties, density, and thickness of layers in the subsurface are attained through analysis of surface wavedispersion.

The surface wave inversion process is the act of inferring elastic properties such as density, shear wave velocity profile, and thickness from dispersion curves created.

When attempting surface wave inversion, phase velocities are used more often than group velocities because it is easier to create a dispersion curve of phase velocities.

The way in which a Fourier transform changes x-t data into x-ω (ω is angular frequency) data shows why phase velocity dominates surface wave inversion theory.

At this point there may be signs of ventricular strain pattern (ST segment depression and T wave inversion) on the EKG, suggesting subendocardial ischemia.

Current standard ECG markers of repolarization abnormalities include ST depression, T wave inversion and QT prolongation.

ST segment depression and T wave inversion in right precordial leads is usually seen in severe RVH such as in pulmonary stenosis and pulmonary hypertension.

The ECG findings most commonly seen in myocarditis are diffuse T wave inversions; saddle-shaped ST-segment elevations may be present (these are also seen in pericarditis).