Patient alignment system with external measurement and object coordination for radiation therapy system
First Claim
1. A control system for a radiation therapy system comprising a moveable patient positioner and a moveable radiation nozzle, wherein the control system generates control signals to induce movement of at least one of the patient positioner and the radiation nozzle and wherein the control system further receives position signals from a plurality of external measurement devices, each of the plurality of external measurement devices being arranged to independently provide position information indicative of a current spatial position of one or more of the patient positioner, of the radiation nozzle, and of fixed reference objects and wherein the control system calibrates the position signals from each of the plurality of external measurement devices with each other and to the fixed reference objects and wherein the control system further generates the control signals so as to induce at least one of the patient positioner and the radiation nozzle to move to achieve a desired translational and rotational alignment of the patient positioner with respect to the radiation nozzle.
1 Assignment
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Accused Products
Abstract
A patient alignment system for a radiation therapy system. The alignment system includes multiple external measurement devices which obtain position measurements of components of the radiation therapy system which are movable and/or are subject to flex or other positional variations. The alignment system employs the external measurements to provide corrective positioning feedback to more precisely register the patient and align them with a radiation beam. The alignment system can be provided as an integral part of a radiation therapy system or can be added as an upgrade to existing radiation therapy systems.
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Citations
18 Claims
- 1. A control system for a radiation therapy system comprising a moveable patient positioner and a moveable radiation nozzle, wherein the control system generates control signals to induce movement of at least one of the patient positioner and the radiation nozzle and wherein the control system further receives position signals from a plurality of external measurement devices, each of the plurality of external measurement devices being arranged to independently provide position information indicative of a current spatial position of one or more of the patient positioner, of the radiation nozzle, and of fixed reference objects and wherein the control system calibrates the position signals from each of the plurality of external measurement devices with each other and to the fixed reference objects and wherein the control system further generates the control signals so as to induce at least one of the patient positioner and the radiation nozzle to move to achieve a desired translational and rotational alignment of the patient positioner with respect to the radiation nozzle.
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10. A method of determining positions of movable components of a radiation therapy system, the method comprising:
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externally measuring positions of a plurality of fixed monuments; defining a fixed frame of reference based on the plurality of fixed monuments; externally measuring position of one or more monuments of at least one movable component of a radiation therapy system; calibrating the measured position of the one or more monuments of the at least one movable component with respect to the defined fixed frame of reference; and calculating a translational location and rotational orientation of the at least one movable component with respect to the fixed frame of reference. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification