Back to results
US RE43,272 E1Granted
X-ray computerized tomographic apparatus
AssigneeKabushiki Kaisha Toshiba
InventorKatsuyuki Taguchi
Life of this patent
Estimating the term…
Abstract
An X-ray computerized tomographic apparatus includes an X-ray tube device configured to irradiate an object to be examined with a pyramidal X-ray beam, a detector which has a plurality of detecting elements arrayed in a slice direction in which X-rays transmitted through the object are detected, a data extending unit which creates virtual data corresponding to an extension region located outside a region in which the detecting elements are arranged in the slice direction on the basis of real data detected by the detecting element, and a reconstructing unit which reconstructs image data on the basis of the real data and virtual data.
Claims40
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object to be examined with a pyramidal X-ray beam;
- a detector which has a plurality of detecting elements arrayed in a slice direction in which X-rays transmitted through the object are detected;
- a data extending unit configured to create virtual data corresponding to an extension region located outside a region in which the detecting elements are arranged in the slice direction on the basis of real data detected by the detecting element;
- and
- a reconstructing unit configured to reconstruct image data on the basis of the real data and virtual data;
- an input device which inputs a radius of the field of view;
- and
- an extension region determining unit configured to determine a length of the extension region on the basis of the input radius of the field of view.
5 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object to be examined with a pyramidal X-ray beam;
- a detector which has a plurality of detecting elements arrayed in a slice direction in which X-rays transmitted through the object are detected;
- an input device which inputs a radius of a field of view;
- and
- a reconstructing unit configured to reconstruct image data about a field of view in which the input radius is maintained within a predetermined length range in the slice direction on the basis of real data detected by the detecting element and virtual data created from the real data, the virtual data corresponding to an extension region located outside a region in which the detecting elements are arranged in the slice direction and being created on the basis of real data detected by the detecting element.
2 more elements
An X-ray computerized tomographic apparatus comprising:
- an X-ray tube device configured to irradiate an object to be examined with a pyramidal X-ray beam;
- a detector which has a plurality of detecting elements arrayed in a slice direction in which X-rays transmitted through the object are detected;
- and
- a reconstructing unit configured to reconstruct image data about a field of view having an arbitrary radius and fixed axis length on the basis of real data detected by the detecting element and virtual data created from the real data, the virtual data corresponding to an extension region located outside a region in which the detecting elements are arranged in the slice direction and being created on the basis of real data detected by the detecting element.
1 more element
An X-ray computerized tomographic apparatus comprising:
- an X-ray tube device configured to irradiate an object to be examined with a pyramidal X-ray beam;
- a detector which has a plurality of detecting elements arrayed in a slice direction in which X-rays transmitted through the object are detected;
- an input device which inputs a size of a field of view;
- and
- a reconstructing unit configured to reconstruct image data about a field of view in which the input size is maintained within a predetermined length range in the slice direction on the basis of real data detected by the detecting element and virtual data created from the real data, the virtual data corresponding to an extension region located outside a region in which the detecting elements are arranged in the slice direction and being created on the basis of real data detected by the detecting element.
2 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a helical scan using said X-ray tube device and said detector to acquire projection data;
- an input device configured to set a field of view and a helical pitch;
- a determining unit configured to determine at least one weighting factor based on the field of view and the helical pitch;
- and
- a reconstructing unit configured to reconstruct a tomographic image based on the projection data to which the at least one weighting factor is applied, using a cone-beam reconstruction method.
4 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a multi-helical scan using said an X-ray tube device and said detector to acquire projection data;
- a calculator configured to apply at least one weighting factor to the projection data to compensate for insufficient or unavailable projection data corresponding to a region of said object;
- and
- a reconstructing unit configured to reconstruct a tomographic image in the region based on the weighted projection data using a cone beam reconstruction method.
3 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a multi-helical scan using said an X-ray tube device and said detector to acquire projection data;
- a calculator configured to calculate, based on the acquired projection data, reconstruction projection data corresponding to an extension region located outside a region in the slice direction in which the detecting elements are arranged;
- and
- a reconstructing unit configured to reconstruct a tomographic image based on the reconstruction projection data using a cone-beam reconstruction method.
3 more elements
A method of generating a tomographic image of an object, comprising:
- setting a field of view and a helical pitch;
- obtaining projection data by a multi-helical scan;
- determining at least one weighting factor based on the set field of view and helical pitch;
- and
- reconstructing the tomographic image based on the projection data to which the weighting factor is applied using a cone-beam reconstruction method.
2 more elements
A method of producing a tomographic image of an object, comprising:
- obtaining projection data by irradiating the object with an X-ray beam in a multi-helical scan and detecting X-rays transmitted through the object using a detector having a plurality of detecting elements arrayed in a slice direction;
- applying at least one weighting factor to the obtained projection data to compensate for insufficient or unavailable projection data corresponding to a region of said object;
- and
- reconstructing the tomographic image in the region based on the weighted projection data using a cone-beam reconstruction method.
1 more element
A method of producing a tomographic image of an object, comprising:
- obtaining projection data by irradiating the object with an X-ray beam in a helical scan and detecting X-rays transmitted through the object using a detector having a plurality of detecting elements arrayed in a slice direction;
- calculating, based on the obtained projection data, reconstruction projection data corresponding to an extension region located outside a region in the slice direction in which the detecting elements are arranged;
- and
- reconstructing the tomographic image based on the reconstruction projection data using a cone-beam reconstruction method.
1 more element
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a multi-helical scan using said an X-ray tube device and said detector to acquire projection data;
- a data extending unit configured to calculate, based on the projection data, reconstruction projection data corresponding to an extension region located outside a region in which the detecting elements are arranged;
- and
- a reconstructing unit configured to reconstruct a tomographic image based on the reconstruction projection data using a cone-beam reconstruction method.
3 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a multi-helical scan using said an X-ray tube device and said detector to acquire projection data;
- a data extending unit configured to apply at least one weighting factor to the acquired projection data to compensate for insufficient or unavailable projection data corresponding to a region of said object;
- and
- a reconstructing unit configured to reconstruct a tomographic image in the region based on the weighted projection data using a cone beam reconstruction method.
3 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a multi-helical scan using said an X-ray tube device and said detector to acquire projection data;
- a data extending unit configured to generate, using replication of the projection data, reconstruction projection data corresponding to an extension region located outside a region in which the detecting elements are arranged;
- and
- a reconstructing unit configured to reconstruct a tomographic image based on the reconstruction projection data using a cone-beam reconstruction method.
3 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a multi-helical scan using said an X-ray tube device and said detector to acquire projection data;
- a data extending unit configured to generate, using extrapolation of the projection data, reconstruction projection data corresponding to an extension region located outside a region in which the detecting elements are arranged;
- and
- a reconstructing unit configured to reconstruct a tomographic image based on the reconstruction projection data using a cone-beam reconstruction method.
3 more elements
An X-ray computerized tomographic apparatus, comprising:
- an X-ray tube device configured to irradiate an object with an X-ray beam;
- a detector having a plurality of detecting elements arrayed in a slice direction, the detecting elements configured to detect X-rays transmitted through the object;
- a controller configured to perform a multi-helical scan using said an X-ray tube device and said detector to acquire projection data;
- a calculator configured to calculate, based on the projection data, reconstruction projection data calculated so that a helical pitch is unrestricted by a set field of view;
- and
- a reconstructing unit configured to reconstruct a tomographic image based on the reconstruction projection data using a cone-beam reconstruction method.
3 more elements
A method of producing a tomographic image of an object, comprising:
- obtaining projection data by irradiating the object with an X-ray beam in a multi-helical scan and detecting X-rays transmitted through the object using a detector having a plurality of detecting elements arrayed in a slice direction;
- calculating, based on the projection data, reconstruction projection data corresponding to an extension region located outside a region in the slice direction in which the detecting elements are arranged;
- and
- reconstructing the tomographic image based on the calculated reconstruction projection data using a cone-beam reconstruction method.
1 more element
A method of producing a tomographic image of an object, comprising:
- obtaining projection data by irradiating the object with an X-ray beam in a multi-helical scan and detecting X-rays transmitted through the object using a detector having a plurality of detecting elements arrayed in a slice direction;
- applying at least one weighting factor to the obtained projection data to compensate for insufficient or unavailable projection data corresponding to a region of said object;
- and
- reconstructing the tomographic image in the region based on the weighted projection data using a cone beam reconstruction method.
1 more element
A method of producing a tomographic image of an object, comprising:
- obtaining projection data by irradiating the object with an X-ray beam in a multi-helical scan and detecting X-rays transmitted through the object using a detector having a plurality of detecting elements arrayed in a slice direction;
- calculating, using replication of the obtained projection data, reconstruction projection data corresponding to an extension region located outside a region in the slice direction in which the detecting elements are arranged;
- and
- reconstructing the tomographic image based on the calculated reconstruction projection data using a cone-beam reconstruction method.
1 more element
A method of producing a tomographic image of an object, comprising:
- obtaining projection data by irradiating the object with an X-ray beam in a multi-helical scan and detecting X-rays transmitted through the object using a detector having a plurality of detecting elements arrayed in a slice direction;
- calculating, using extrapolation of the obtained projection data, reconstruction projection data corresponding to an extension region located outside a region in the slice direction in which the detecting elements are arranged;
- and
- reconstructing the tomographic image based on the calculated reconstruction projection data using a cone-beam reconstruction method.
1 more element
A method of producing a tomographic image of an object, comprising:
- obtaining projection data by irradiating the object with an X-ray beam in a multi-helical scan and detecting X-rays transmitted through the object using a detector having a plurality of detecting elements arrayed in a slice direction;
- calculating, based on the obtained projection data, reconstruction projection data calculated so that a helical pitch is unrestricted by a set field of view;
- and
- reconstructing the tomographic image based on the calculated reconstruction projection data using a cone-beam reconstruction method.
1 more element
Dependencies are inferred from the claim text.