Prostate Cancer Clinical Trial
Official title:
A Phase II Biomarker Study of Restriction Spectrum Imaging (RSI) MRI in Patients With High-Risk, Localized Prostate Cancer Who Will Receive Radiotherapy and Androgen Deprivation Therapy
Adult male patients with high-risk, localized prostate cancer and planning to undergo radiation therapy (RT) with androgen deprivation therapy (ADT) will undergo an advanced Magnetic Resonance Imaging (MRI) examination called Restriction Spectrum Imaging (RSI-MRI) to evaluate whether RSI-MRI can predict treatment response.
Participants will undergo RSI at three time points: before therapy (MRI #1), after neoadjuvant ADT (MRI #2), and after radiotherapy (MRI #3). Treatment response will be assessed primarily by absence of biochemical recurrence (PSA ≥2 ng/mL greater than nadir) within 3 years of completing radiotherapy. Change in RSI cellularity index from MRI #1 to MRI #2 will be evaluated for prediction of participants who will experience biochemical recurrence within 3 years, using area under the receiver operating characteristic curve. We hypothesize that RSI cellularity index will be an early biomarker for treatment effectiveness in prostate cancer treated with ADT and radiotherapy. ;
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