The graphic representation of the ultrasound frequency shift or velocity range and amplitude can be depicted as a histogram.

If available, some graphic aids can be helpful to show image orientations.
1) A graphic icon of the labeled primary axes (A, L, H) with relative lengths given by direction sines and orientation as if viewed from the normal to the image plane can help orient the viewer, both to identify image plane orientation and to indicate possible in plane rotation.
2) Ingraphic prescription of obliques from other images, a sample original image with an overlaid line or set of lines indicating the intersection of the original and oblique image planes can help orient the viewer.


In all cases the scanning surface is assigned to the top of the image. The orientation of single oblique slices can be specified by rotating a slice in one of the basic orientations toward one of the other two basic orthogonal planes about an axis defined by the intersection of the 2 planes.

See also Histogram.

Phase in ultrasound describes where the sound wave is in its cycle of amplitude change. Different waves oscillate at different frequencies, so time is often not a suitable measure of phase.
The phase shift is a difference in the phase or the temporal offset of the peaks of a waveform along one scan line.

See also Coherence, and Histogram.