Andy LITTLE,Antonio COSSU,Florian WEBER,Per BERGFJORD,Rui LIU,Ulrike LUTZ,Colin WINFIELD
申请号：
US16653096
公开号：
US20200114173A1
申请日:
2019.10.15
申请国别(地区):
US
年份:
2020
代理人:
摘要：
According to an exemplary embodiment of the present disclosure, a determination of a (floating) isocenter of a radiotherapy system can be provided. For example, the radiotherapy system can comprises a patient support structure, a gantry configured to be rotatable around a gantry axis and having a radiation source, and at least one radiation imaging device. The system can include a calibration system comprising at least one first optical detector mounted at the gantry, at least one second optical detector fixed in a surrounding area of the patient support structure and/or the gantry, first fiducial markers selectively attachable at the patient support structure at defined positions and detectable by the first optical detector, and a phantom selectively attachable at the patient support structure at a defined position. The phantom can include second fiducial markers detectable by the second optical detector, and third fiducial markers configured to be detectable by the radiation imaging device. The system can comprises a controller configured to selectively activate the radiation source and rotate the gantry, and, for one or more rotational positions of the gantry, to determine a point of intersection of a beam axis of the radiation source and the gantry axis by linking detection data of the first optical detector, the second optical detector and/or the radiation imaging device.
