What does accurate patient data help ensure during treatment planning?

Accurate patient data is crucial in treatment planning because it allows for precise dose calculations and adjustments that take into account variations in tissue density and composition within the patient's body. These variations, known as body inhomogeneities, can significantly affect how radiation distributes within the body, potentially impacting treatment efficacy and safety. By having detailed and accurate patient data, medical professionals can tailor the radiation dose to ensure that tumors receive the maximum therapeutic dose while minimizing exposure to surrounding healthy tissues. This precision is vital for optimizing treatment outcomes and reducing the risk of side effects associated with radiation therapy.