EREctile Function Preservation for Prostate Cancer Radiation Therapy (ERECT)

This study is comparing different radiation techniques for prostate cancer to see which approach best preserves erectile function while still effectively treating the cancer. **You may be eligible if...** - You are 18 years or older - You have been diagnosed with low-risk or intermediate-risk prostate cancer confirmed by biopsy - You currently have normal or near-normal erectile function (based on a standard questionnaire) - You are in good general health **You may NOT be eligible if...** - Your prostate cancer is high-risk or has spread beyond the prostate - You already have significantly reduced erectile function - Your health status is too poor to tolerate radiation therapy Talk to your doctor to see if this trial is right for you.