149 Chapter 7: Conclusions and Outlook tive ‘dead cone.’ Not neglecting factors small in x led to a significant reduction in the production radiation, although the Ter-Mikayelian effect remained simi- lar in magnitude to previous computations. The importance of including these factors in gluon bremsstrahlung radiation calculations is not yet known but is of course of crucial interest. The future of jet tomography in heavy ion collisions is far from rosy. We demonstrated in this thesis that very interesting physics can be explored in a qualitative way using high- p$_{T}$ probes. At the same time, making the not insignificant assumption of a self-consistent model of energy loss in qualitative agreement with data, the current, admittedly rough, estimates of theoretical precision are low. Future experimental results will be invaluable in guiding the focus of theoretical research on the pertinent approximation regimes in nuclear physics; future work in quantifying, then reducing theoretical error may yet prove jet tomography possible.