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US 8,027,715 B2Granted
Non-linear correlation models for internal target movement
AssigneeAccuray Incorporated
InventorSohail Sayeh
Life of this patent
Estimating the term…
Abstract
A method and apparatus to track non-linear internal target movement based on movement of an external marker.
Claims21
A computer-implemented method, comprising:
- receiving a plurality of data points representative of a corresponding plurality of positions over time of an external marker associated with respiration of a patient;
- receiving a plurality of images of an internal target of the patient, the plurality of images corresponding in time to the plurality of data points;
- developing, using a processing device, a non-linear correlation model of a non-linear path of movement of the target based on the plurality of data points and the plurality of images to correlate a plurality of positions of the internal target with the plurality of positions of the external marker, wherein developing the non-linear correlation model comprises:
- generating an inspiration approximation associated with the non-linear path of movement of the target over an inspiration interval of the non-linear path;
- generating an expiration approximation associated with the non-linear path of movement of the target over an expiration interval of the non-linear path;
- and
- generating one or more matching approximations to link the inspiration approximation and the expiration approximation.
4 more elements
An apparatus, comprising:
- a data storage device to store a plurality of data points representative of a corresponding plurality of positions over time of an external marker, the data storage device to store a plurality of images of an internal target of the patient, the plurality of images corresponding in time to the plurality of data points;
- and
- a processing device coupled to the data storage device, the processing device configured to:
- develop a non-linear correlation model of a non-linear path of movement of the target based on the plurality of data points and the plurality of images to correlate a plurality of positions of the internal target with the plurality of positions of the external marker, wherein developing the non-linear correlation model comprises:
- generate an inspiration approximation associated with the non-linear path of movement of the target over an inspiration interval of the non-linear path;
- generate an expiration approximation associated with the non-linear path of movement of the target over an expiration interval of the non-linear path;
- and
- generate one or more matching approximations to link the inspiration approximation and the expiration approximation.
5 more elements
A non-transitory machine readable storage medium having instructions thereon, which when executed by a processing device, cause the processing device to perform one or more operations comprising:
- receiving a plurality of data points representative of a corresponding plurality of positions over time of an external marker associated with respiration of a patient;
- receiving a plurality of images of an internal target of the patient, the plurality of images corresponding in time to the plurality of data points;
- developing, using a processing device, a non-linear correlation model of a non-linear path of movement of the target based on the plurality of data points and the plurality of images to correlate a plurality of positions of the internal target with the plurality of positions of the external marker, wherein developing the non-linear correlation model comprises:
- generating an inspiration approximation associated with the non-linear path of movement of the target over an inspiration interval of the non-linear path;
- generating an expiration approximation associated with the non-linear path of movement of the target over an expiration interval of the non-linear path;
- and
- generating one or more matching approximations to link the inspiration approximation and the expiration approximation.
4 more elements
Dependencies are inferred from the claim text.