Intensity-modulated radiation therapy (IMRT) is an advanced form of radiation therapy used to treat cancer. It allows doctors to deliver precise doses of radiation to tumors while minimizing exposure to surrounding healthy tissues. This is achieved by varying the intensity of the radiation beams, which can be shaped to match the contours of the tumor. IMRT uses computer software to create detailed treatment plans based on imaging studies, such as CT scans or MRI. This technology enables oncologists to target complex tumor shapes and locations, improving treatment effectiveness and reducing side effects for patients undergoing cancer treatment.