System to stabilize an irradiated internal target
DCFirst Claim
1. A stabilizing system comprising:
- markers, the markers being located in a body, and the markers having a reference set of positions relative to external coordinates, the reference set of positions having a calibrated spatial relationship to a target volume in the body;
an imager which images the markers and produces a initial imager output signal which is functionally related to an initial set of positions of the markers relative to the external coordinates at an initial time and produces a subsequent imager output signal which is functionally related to a subsequent set of positions relative to the external coordinates at a subsequent time;
a data processor which receives the initial imager output signal, receives the subsequent imager output signal, compares the initial imager output signal with the subsequent imager output signal, and produces a control output signal;
an actuator sub-system, the actuator sub-system being connected to the body, and the actuator sub-system being driven by the control output signal to move the body.
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Abstract
A stabilizing system, which is especially useful in radiation therapy, has markers located in a body in a set of positions relative to external coordinates, the set of positions having a calibrated spatial relationship with a target volume in the body, the markers being imaged by an imager at subsequent times to produce subsequent imager output signals which are compared by a data processor which generates a control signal which drives an actuator sub-system to move the body to stabilize the target volume relative to the external coordinates, wherein confounding effects of high energy, high intensity radiations which may also be present in the body are overcome by various distinguishing arrangements.
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Citations
15 Claims
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1. A stabilizing system comprising:
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markers, the markers being located in a body, and the markers having a reference set of positions relative to external coordinates, the reference set of positions having a calibrated spatial relationship to a target volume in the body; an imager which images the markers and produces a initial imager output signal which is functionally related to an initial set of positions of the markers relative to the external coordinates at an initial time and produces a subsequent imager output signal which is functionally related to a subsequent set of positions relative to the external coordinates at a subsequent time; a data processor which receives the initial imager output signal, receives the subsequent imager output signal, compares the initial imager output signal with the subsequent imager output signal, and produces a control output signal; an actuator sub-system, the actuator sub-system being connected to the body, and the actuator sub-system being driven by the control output signal to move the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification