| 摘要 |
A radiation-therapy treatment-facilitation platform (200) provides (101) treatment-plan information regarding a plurality of different angles of exposure to employ when administering radiation therapy to a given target volume (203). This treatment-plan information is then used (103) to determine corresponding, and differing, aperture configuration for a second collimator (207) that is disposed between a source (201) for the radiation-therapy beam (202) and a multileaf collimator (206). By one approach, this second collimator is dynamically used when administering the radiation therapy for at least some of the differing angles of exposure. These teachings will optionally accommodate also providing (102) form information regarding the target volume that is used, along with the aforementioned treatment-plan information, to determine the aperture settings for the second collimator.
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