Non-planar treatment beam control

摘要

The present invention relates to a data processing method for determining control data for controlling beam positions which beam positions describe positions which a treatment beam has or would have if emitted by a beam source, the treatment beam being for treating a treatment body part of a patient, said method constituted to be performed by a computer and comprising the steps of: • providing treatment data which comprise data on a position of the treatment body part; • providing condition data which describe: constraints on the beam positions and/or constraints on positional changes of the beam positions, wherein said constraints allow for at least a part of the beam positions to lie not in a common plane; • providing an arrangement of the beam positions on the basis of the treatment data which arrangement fulfils the condition data; • determining control data for controlling a change of a relative position of the beam source relative to the treatment body part for changing the beam positions and for controlling an emission of the treatment beam from the beam source, the determined control data being constituted to change the beam positions to follow the provided arrangement of the beam positions and to cause continuous emission of the treatment beam during a continuous change of the beam positions while the beam positions follow at least a part of the arrangement.

主权项

1. A method for determining control data and controlling beam positions of a treatment beam for treating a treatment body part of an associated patient, the beam positions describing positions which a treatment beam has or would have if emitted by an associated beam source, said method being performed by a computer and comprising:
providing treatment data which comprises data on a position of the treatment body part; providing condition data which describes constraints on the beam positions and/or constraints on positional changes of the beam positions, wherein said constraints allow for at least a part of the beam positions to lie not in a common plane; providing an arrangement of the beam positions on the basis of the treatment data which arrangement fulfils the condition data; determining control data for controlling a change of relative position between the beam source and the treatment body part, and for controlling an emission of the treatment beam from the beam source, the determined control data being configured to change the beam positions to follow the provided arrangement of the beam positions and to cause continuous emission of the treatment beam during a continuous change of the beam positions while the beam positions follow at least a part of the arrangement; and controlling the beam position by outputting control signals corresponding to the determined control data, wherein the condition data further describe at least one position of at least one specific outside body part, wherein the condition data include a condition according to which the arrangement is determined such that lines representing the treatment beam at the beam positions are arranged such that they lie in a virtual curved surface and such that following the arrangement results in a continuous undulating relative movement between the beam source and the treatment body part, wherein the relative movement occurs at least partly around the treatment body part, and according to which relative movement the beam source continuously emits the treatment beam during at least one or more parts of the continuous movement, the continuous undulating movement comprising a forward movement in one degree of freedom about a first axis and, during the forward movement about the first axis, a forward and backward movement in another degree of freedom about a second axis, the first and second axes passing through the treatment body part.