EPIDs play a crucial role in treatment planning and delivery. Before starting radiation therapy, the patient undergoes a CT scan or MRI to create a detailed map of the tumor and surrounding anatomy. This information is used to design a treatment plan that specifies the precise location and dose of radiation to be delivered. During treatment, EPIDs capture images that are compared with the treatment plan to ensure that the radiation is being delivered accurately. Any discrepancies can be corrected in real-time, enhancing the precision and effectiveness of the treatment.
