Immobilization devices used during the simulation procedure must be the same ones used each day during the patient's treatment. What is the correct answer?

Using the same immobilization devices throughout the simulation procedure and each day during treatment is critical in radiation therapy. Consistency in immobilization ensures that the patient is positioned in the exact same way for every treatment session, which is essential for maximizing the accuracy of the treatment delivery. Variations in positioning can lead to changes in the treatment area, potentially affecting the radiation dose received by the tumor versus surrounding healthy tissues.

Additionally, maintaining the same immobilization method helps to maintain treatment reproducibility, which is necessary for achieving optimal outcomes, minimizing side effects, and ensuring that the treatment plan is effective for each session. Therefore, the statement that immobilization devices must be the same each day during the patient's treatment is accurate.