  We present simulations of Bragg Coherent X-ray Diffractive Imaging (CXDI)
data from finite crystals in the frame of the dynamical theory of x-ray
diffraction. The developed approach is based on numerical solution of modified
Takagi-Taupin equations and can be applied for modeling of a broad range of
x-ray diffraction experiments with finite three-dimensional crystals of
arbitrary shape also in the presence of strain. We performed simulations for
nanocrystals of a cubic and hemispherical shape of different sizes and provided
a detailed analysis of artifacts in the Bragg CXDI reconstructions introduced
by the dynamical diffraction. A convenient way to treat effects of refraction
and absorption supported by analytical derivations is described. Our results
elucidate limitations for the kinematical approach in the Bragg CXDI and
suggest a natural criterion to distinguish between kinematical and dynamical
cases in coherent x-ray diffraction on a finite crystal.
