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Single Fraction Stereotactic Body Radiation Therapy Guided by Magnetic Resonance Imaging for the Treatment of Liver Metastasis from Colorectal Cancer

Trial Status: active

This phase II trial studies the effectiveness of a single treatment fraction of stereotactic body radiation therapy (SBRT) guided by magnetic resonance imaging (MRI) in treating patients with colorectal cancer that has spread from where it first started (primary site) to the liver (liver metastasis). SBRT enables precise delivery of high-dose radiation to tumors. This targeted radiation therapy kills cancer cells within the tumor without damaging healthy cells surrounding it. SBRT uses imaging scans (usually computed tomography [CT] scans) to find the location of a tumor so that the radiation can be more precisely delivered to cancer cells. MRI scans are better than CT scans at identifying liver tumors and the surrounding normal organs. In addition, MRI-based radiation machines allow radiation doctors to adjust the radiation plan at the time of treatment if any changes in organ position are detected. This helps to ensure that the tumor is targeted more precisely with greater sparing of surrounding normal organs. MRI scans are often done with contrast. In this study, Gd-EOB-DTPA, a dye that is routinely used for MRI scans of the liver is utilized. One session (fraction) of MRI-guided SBRT may shrink or stabilize colorectal cancer liver metastasis by making the treatment more precise.