  Computational ultrasound imaging has become a well-established methodology in
the ultrasound community. In the accompanying paper (part I), we described a
new ultrasound simulator (SIMUS) for Matlab, which belongs to the Matlab
UltraSound Toolbox (MUST). SIMUS can generate pressure fields and
radiofrequency RF signals for simulations in medical ultrasound imaging. It
works in a harmonic domain and uses linear equations derived from far-field and
paraxial approximations. In this article (part II), we illustrate how SIMUS
compares with three popular ultrasound simulators (Field II, k-Wave, and
Verasonics) for a homogeneous medium. We designed different transmit sequences
(focused, planar, and diverging wavefronts) and calculated the corresponding
2-D and 3-D (with elevation focusing) RMS pressure fields. SIMUS produced
pressure fields similar to those of Field II and k-Wave. The acoustic fields
provided by the Verasonics simulator were significantly different from those of
SIMUS and k-Wave, although the overall appearance remained consistent. Our
simulations tend to demonstrate that SIMUS is reliable and can be used on a par
with Field II and k-Wave for realistic ultrasound simulations.
