Feasibility and Effectiveness of Respiratory Movement Management in Lung Cancer Receiving Stereotactic Radiotherapy Using a Novel Positional Fixation Device

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The purpose of this clinical trial is to understand the safety and effectiveness of abdominal pressure devices in inhibiting respiratory movement in lung cancer patients. The main question it aims to answer is: Did the abdominal pressure device reduce the respiratory movement of participants with lung cancer tumors? Participants will: Record how much they use abdominal pressure devices to suppress lung cancer tumor respiratory movement