| 摘要 |
Some embodiments include creation of projection images of a patient volume using one or more x-ray sources, performance of digital tomosynthesis on the projection images to generate a cross-sectional image of the patient volume, determination of a location of a target within the patient volume based on the cross-sectional image, determination of a location of a Bragg peak associated with an ion beam, and determination of a difference between the location of the target and the location of the Bragg peak. In some aspects, the patient volume is moved to move the target toward the location of the Bragg peak based on the difference. Additionally or alternatively, one or more characteristics of the ion beam may be changed to move the location of the Bragg peak toward the location of the target based on the difference. The one or more radiation sources may comprise a plurality of x-ray sources disposed in a fixed relationship to each other. Each of the plurality of x-ray sources may also be disposed in a fixed relationship to the ion beam source.
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