The investigators anticipate that results from this study will confirm the hypothesis that Tomotherapy plans incorporating a simultaneous integrated boost for cervix cancer will provide superior target volume coverage and normal critical structure avoidance when compared with step-and-shoot IMRT and conventional plans. Such confirmation will provide the basis to proceed with efforts to improve target and normal structure delineation for Tomotherapy treatment planning of cervix cancer using MRI-based planning. Ultimately, we plan to initiate phase I/II trials using MRI-based Tomotherapy planning and delivery techniques for cervix cancer patients. Incorporation of RT dose escalation and monitoring of treatment response with biologic imaging techniques for cervix cancer patients treated with Tomotherapy are other future potential areas of investigation.