  We investigate the temperature dependence of quasiparticle interference in
the high $T_c$-cuprates using an Exact-Diagonalization + Monte-Carlo based
scheme to simulate the $d$-wave superconducting order parameter. The
quasiparticle interference patterns have features largely resulting from the
scattering vectors of the octet model at lower temperature. Our findings
suggest that the features of quasiparticle interference in the pseudogap region
of the phase diagram are also dominated by the set of scattering vectors
belonging to the octet model because of the persisting antinodal gap beyond the
superconducting transition $T_c$. However, beyond a temperature when the
antinodal gap becomes very small, a set of scattering vectors different from
those belonging to the octet model are responsible for the quasiparticle
interference patterns. With a rise in temperature, the patterns are
increasingly broadened.
