Test object for the validation of tracking in the presence of motion

摘要

A target motion simulator system for use in verifying target tracking with a radiation therapy device. The system comprises a radiation detection target coupled to a first motion actuator simulating a first motion of a first tissue and a fiducial coupled to a second motion actuator simulating a second motion of a second tissue offset from the first tissue, a component of the first motion being asynchronous with the second motion. A synthetic physiological signal generator is synchronized with the component of the first motion, wherein an output signal from the generator, in combination with a sensed position of the fiducial, may be used by the radiation therapy device in tracking the target.

主权项

1. A target motion simulator system for use in verifying target tracking with a radiation therapy device, the radiation therapy device configured to direct beams of radiation into a patient at a patient treatment location, the system comprising:
a radiation detection target coupled to a first motion actuator, the radiation detection target including a material sensative to the beams of radiation, the first motion actuator supporting the radiation detection target at the patient treatment location and configured to move the radiation detection relative to the radiation therapy device so as to simulate a first motion of a first tissue; a fiducial coupled to a second motion actuator, the fiducial comprising an imageable structure and the first motion actuator supporting the fiducial and configured to move the fiducial relative to the radiation therapy device so as to simulate a second motion of a second tissue offset from the first tissue, a component of the first motion being asynchronous with the second motion; and a synthetic electrocardiogram (EKG) signal generator synchronized with the component of the first motion, wherein an output signal from the generator is configured for transmission to the radiation therapy device so as to facilitate, in combination with a sensed position of the moving fiducial, the radiation therapy device in tracking the moving target while the radiation therapy device is direting the beams of radiation toward the moving target.