This is a prospective, phase II non-randomised controlled clinical study. Dose escalation will be implemented using 1.8 Gy increments from baseline 75.6 Gy. Patients' RT prescription may be escalated up to max 81 Gy once dose volume constraints are adhered to. All patients will be treated using the participating institution's standard rectal preparation protocol, bladder-filling protocol and appropriate immobilisation device(s). Cone beam CT on-treatment imaging is recommended for this study. However, the use of individual institutional imaging equipment and techniques is permitted. Acute GU/GI toxicities will be assessed weekly during treatment. GU/GI toxicities will also be assessed 2 months post RT, 8 months post RT and 6 monthly thereafter to year nine and in line with the participating institution's standard routine follow-up (FU) thereafter. Translational sub-studies (optional), only apply to patients who are consented prior to commencement of hormone therapy at centres participating in the translational sub-study. Patients at centres participating in the translational sub-studies will be given the option of participating in sub-study 1 (Proteomic Analysis), sub-study 2 (Raman spectroscopic analysis), or both (sample collection will not be mandatory).
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Biochemical Failure Free survival
Timeframe: 7-9 years median follow-up