  Full one-loop electroweak-corrections for an $e^-e^+\rightarrow t \bar{t}$
process associated with sequential $t\rightarrow b \mu\nu_\mu$ decay are
discussed. At the one-loop level, the spin-polarization effects of the initial
electron and positron beams are included in the total and differential cross
sections. A narrow-width approximation is used to treat the top-quark
production and decay while including full spin correlations between them. We
observed that the radiative corrections due to the weak interaction have a
large polarization dependence on both the total and differential cross
sections. Therefore, experimental observables that depend on angular
distributions such as the forward-backward asymmetry of the top production
angle must be treated carefully including radiative corrections. We also
observed that the energy distribution of bottom quarks is majorly affected by
the radiative corrections.
