X-ray computed tomography apparatus
AssigneeKabushiki Kaisha Toshiba
InventorHisahiro Shinohara
Life of this patent
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Abstract
Projection data is repeatedly acquired by a helical scan operation. Tomographic image data is repeatedly reconstructed on the basis of projection data. Generally, in a helical scan operation, in order to reduce the artifact, interpolation processing of projection data is indispensable. Tomographic image is reconstructed on the basis of acquired original projection data without performing this interpolation processing so as to meet the condition that the time required to reconstruct tomographic image data on the basis of one set of projection data required for the reconstruction of tomographic image data be shorter than that required to acquire one set of projection data. The real-time mode can therefore be introduced into a helical scan operation.
Claims9
An X-ray computed tomography apparatus comprising:
- acquisition means for repeatedly acquiring projection data associated with a subject by a helical scan operation;
- reconstruction means capable of selecting a first mode of reconstructing tomographic image data on the basis of original projection data acquired by said acquisition means, and a second mode of interpolating the original projection data acquired by said acquisition means, and reconstructing tomographic image data on the basis of the interpolated projection data, and in the first mode, a time required to reconstruct the tomographic image data on the basis of one set of projection data required for reconstruction of one-frame tomographic image data being shorter than a time required for acquisition of the one set of projection data;
- and
- display means for displaying the reconstructed tomographic image data as a moving image.
An X-ray computed tomography apparatus comprising:
- acquisition means for acquiring projection data associated with a subject by a helical scan operation;
- interpolation means for interpolating the projection data;
- reconstruction means for reconstructing tomographic image data on the basis of one set of the projection data or interpolated projection data;
- display means for displaying the reconstructed tomographic image data;
- and
- means for controlling said interpolation means to avoid interpolation of the projection data, when a time required for reconstruction of the tomographic image data is shorter than a time required for acquisition of one set of the projection data.
Dependencies are inferred from the claim text.