Patient alignment system with external measurement and object coordination for radiation therapy system

摘要

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.

主权项

1. A radiation therapy delivery system comprising a moveable radiation nozzle, a moveable patient positioner, and a plurality of fixed landmarks, wherein the system is configured to determine a current three-dimensional spatial position and angular orientation of at least one of the radiation nozzle and the patient positioner with reference to the plurality of fixed landmarks, and wherein the system is further configured to induce movement of at least one of the radiation nozzle and the patient positioner based on the current spatial position and angular orientation, of at least one of the radiation nozzle and the patient positioner to achieve a desired translational and rotation alignment of the patient positioner with respect to the radiation nozzle.