  Within transport calculations we study the production and decay of
$\omega$-mesons in $pA$ reactions at COSY energies including elastic and
inelastic ${\omega}N$ rescattering, the $\omega{\to}\pi^0\gamma$ Dalitz decay
as well as $\pi^0 N$ rescattering. The resulting invariant $\pi^0 \gamma$ mass
distributions indicate that in-medium modifications of the $\omega$-meson may
be observed experimentally.
