| 摘要 |
The present application relates to a determination method for determining an indicator body part subject to vital movement that is not to be irradiated and that serves as an indicator of the change in position of a body part subject to vital movement that is to be irradiated, in particular a tumor in an anatomical body, and/or for determining an indicator trajectory that describes the vital movement of the indicator body part, comprising the following steps: pre-analysis data, which was obtained before irradiation and describes with temporal resolution in a three-dimensional space those positions of the body part subject to vital movement that is to be irradiated that are changed by a vital movement, and the positions of at least one candidate body part that is not to be irradiated, is collected; a pre-target trajectory that describes a vital movement performed by the body part subject to vital movement that is to be irradiated is determined on the basis of the pre-analysis data; at least one candidate trajectory that describes the positions of at least one of the candidate body parts that are not to be irradiated is determined on the basis of the pre-analysis data; on the basis of the at least one candidate trajectory and the pre-target trajectory, at least one of the at least one candidate body parts is determined as an indicator body part and/or one of the at least one candidate trajectories is determined as a pre-indicator trajectory, or on the basis of the at least one candidate trajectory and the pre-target trajectory, the fact that none of the candidate body parts may be determined as a pre-indicator body part and/or none of the candidate trajectories may be determined as a pre-indicator trajectory is determined.
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