Back to results
US 9,420,975 B2Granted
Imaging facility and radiation therapy device
AssigneeSiemens Aktiengesellschaft
InventorsMarcus Gutfleisch, Thomas Knöfel, Gerhard Lechsel, Alexander Passin, Thomas Tücking
Life of this patent
Estimating the term…
Abstract
An imaging facility having an X-ray source, an X-ray detector, and a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation. The imaging facility also has a first translation facility operable to move the X-ray source in a direction that has a component that is tangential to a circle of rotation around the center of rotation.
Claims22
An imaging facility comprising:
- an X-ray source operable to emit a cone beam;
- an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface;
- a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation;
- a first translation facility configured to move the X-ray source from a first position relative to a portion of the rotation facility in a direction that has a component that is tangential to a circle of rotation around the center of rotation;
- a second translation facility configured to move the X-ray detector from a second position relative to the portion of the rotation facility, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, image data is recorded while the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, image data is recorded when the X-ray source and the X-ray detector are moved by the first translation facility and the second translation facility, respectively, to be aligned with each other such that the central beam emitted by the X-ray source runs laterally past the center of rotation;
- and
- a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated, wherein the processor is configured to perform a first pre-weighting of the image data recorded in the first operating mode and a second pre-weighting of the image data recorded in the second operating mode, wherein the first pre-weighting is different than the second pre-weighting, wherein the second pre-weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode,
- wherein the first pre-weighting is based on pixel coordinates relative to a point of contact of the isocentric beam, and
- wherein the second pre-weighting is based on pixel coordinates relative to a point of impact of a beam striking the surface of the X-ray detector at a substantially perpendicular angle.
6 more elements
A radiation therapy device comprising:
- a therapeutic radiation source configured to direct a therapeutic treatment beam onto an object to be irradiated;
- and
- an imaging facility comprising:
- an X-ray source operable to emit a cone beam;
- an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface;
- a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation;
- a first translation facility configured to move the X-ray source from a first position relative to a portion of the rotation facility, in a direction that has a component that is tangential to a circle of rotation around the center of rotation;
- a second translation facility configured to move the X-ray detector from a second position relative to the portion of the rotation facility, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, image data is recorded while the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, image data is recorded when the X-ray source and the X-ray detector are moved by the first and second translation facilities to be aligned with each other such that the central beam emitted by the X-ray source runs laterally past the center of rotation;
- and
- a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated, wherein the processor is configured to perform a first pre-weighting of the image data recorded in the first operating mode and a second pre-weighting of the image data recorded in the second operating mode, wherein the first pre-weighting is different than the second pre-weighting, wherein the second pre-weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode,
- wherein the first pre-weighting is based on the X-ray source being centered with respect to the X-ray detector, and
- wherein the second pre-weighting is based on comparison of pixel coordinates to coordinates of a point of impact of a beam striking the surface of the X-ray detector at a substantially perpendicular angle.
9 more elements
An imaging facility comprising:
- an X-ray source operable to emit a cone beam;
- an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface;
- a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation;
- a first translation facility operable to move the X-ray source in a direction that has a component that is tangential to a circle of rotation around the center of rotation, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, the X-ray detector is configured to record image data while the X-ray source and the X-ray detector are rotated around the center of rotation, and the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, the X-ray detector is configured to record image data while the X-ray source and the X-ray detector are rotated around the center of rotation and the X-ray source is moved by the first translation facility such that the central beam emitted by the X-ray source runs laterally past the center of rotation;
- and
- a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated and further configured to perform, during the reconstruction, a first weighting of the image data recorded in the first operating mode and a second weighting of the image data recorded in the second operating mode, wherein the first weighting is different than the second weighting, wherein the second weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode,
- wherein the first weighting is based on the X-ray source being centered with respect to the X-ray detector, and
- wherein the second weighting is based on comparison of pixel coordinates to coordinates of a point of impact of a beam striking the surface of the X-ray detector at a substantially perpendicular angle.
5 more elements
An imaging facility comprising:
- an X-ray source operable to emit a cone beam;
- an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface;
- a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation;
- a first translation facility configured to move the X-ray source from a first position relative to a portion of the rotation facility in a direction that has a component that is tangential to a circle of rotation around the center of rotation;
- a second translation facility configured to move the X-ray detector from a second position relative to the portion of the rotation facility, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, image data is recorded while the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, image data is recorded when the X-ray source and the X-ray detector are moved by the first translation facility and the second translation facility, respectively, to be aligned with each other such that the central beam emitted by the X-ray source runs laterally past the center of rotation;
- and
- a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated, wherein the processor is configured to perform a first pre-weighting of the image data recorded in the first operating mode and a second pre-weighting of the image data recorded in the second operating mode, wherein the first pre-weighting is different than the second pre-weighting, wherein the second pre-weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode,
- wherein the first pre-weighting is based on a comparison of pixel coordinates to coordinates of a first beam striking the surface of the X-ray detector at a substantially perpendicular angle, and the second pre-weighting is based on a comparison of pixel coordinates to coordinates of a second beam striking the surface of the X-ray detector at a substantially perpendicular angle.
5 more elements
A radiation therapy device comprising:
- a therapeutic radiation source configured to direct a therapeutic treatment beam onto an object to be irradiated;
- and
- an imaging facility comprising:
- an X-ray source operable to emit a cone beam;
- an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface;
- a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation;
- a first translation facility configured to move the X-ray source from a first position relative to a portion of the rotation facility, in a direction that has a component that is tangential to a circle of rotation around the center of rotation;
- a second translation facility configured to move the X-ray detector from a second position relative to the portion of the rotation facility, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, image data is recorded while the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, image data is recorded when the X-ray source and the X-ray detector are moved by the first and second translation facilities to be aligned with each other such that the central beam emitted by the X-ray source runs laterally past the center of rotation;
- and
- a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated, wherein the processor is configured to perform a first pre-weighting of the image data recorded in the first operating mode and a second pre-weighting of the image data recorded in the second operating mode, wherein the first pre-weighting is different than the second pre-weighting, wherein the second pre-weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode,
- wherein the first pre-weighting is based on a comparison of pixel coordinates to coordinates of a first beam striking the surface of the X-ray detector at a substantially perpendicular angle, and the second pre-weighting is based on a comparison of pixel coordinates to coordinates of a second beam striking the surface of the X-ray detector at a substantially perpendicular angle.
8 more elements
An imaging facility comprising:
- an X-ray source operable to emit a cone beam;
- an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface;
- a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation;
- a first translation facility operable to move the X-ray source in a direction that has a component that is tangential to a circle of rotation around the center of rotation, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, the X-ray detector is configured to record image data while the X-ray source and the X-ray detector are rotated around the center of rotation, and the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, the X-ray detector is configured to record image data while the X-ray source and the X-ray detector are rotated around the center of rotation and the X-ray source is moved by the first translation facility such that the central beam emitted by the X-ray source runs laterally past the center of rotation;
- and
- a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated and further configured to perform, during the reconstruction, a first weighting of the image data recorded in the first operating mode and a second weighting of the image data recorded in the second operating mode, wherein the first weighting is different than the second weighting, wherein the second weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode,
- wherein the first weighting is based on a comparison of pixel coordinates to coordinates of a first beam striking the surface of the X-ray detector at a substantially perpendicular angle, and the second weighting is based on a comparison of pixel coordinates to coordinates of a second beam striking the surface of the X-ray detector at a substantially perpendicular angle.
4 more elements
An imaging facility comprising:
- an X-ray source operable to emit a cone beam;
- an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface;
- a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation;
- a first translation facility operable to move the X-ray source in a direction that has a component that is tangential to a circle of rotation around the center of rotation, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, the X-ray detector is configured to record image data while the X-ray source and the X-ray detector are rotated around the center of rotation, and the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, the X-ray detector is configured to record image data while the X-ray source and the X-ray detector are rotated around the center of rotation and the X-ray source is moved by the first translation facility such that the central beam emitted by the X-ray source runs laterally past the center of rotation;
- and
- a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated and further configured to perform, during the reconstruction, a first weighting of the image data recorded in the first operating mode and a second weighting of the image data recorded in the second operating mode, wherein the first weighting is different than the second weighting, wherein the second weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode,
- wherein the first weighting is based a first projection matrix that reflects the X-ray source being centered with respect to the X-ray detector, and
- wherein the second weighting is based on a second projection matrix that reflects the X-ray source being shifted with respect to the X-ray detector.
5 more elements
Dependencies are inferred from the claim text.