Three-dimensional reprojected image forming apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsAkihiko Nishide, Kazushige Takahashi
Life of this patent
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Abstract
Continuous tomographic image data obtained by a tomographic image forming unit such as an X-ray CT scanner is stored in a two-dimensional image memory under the control of a control computer. A two-dimensional space filtering processor, a two-dimensional affine transformation processor and a two-dimensional image addition processor are connected to the control computer and execute two-dimensional affine transformation, two-dimensional image addition and two dimensional space filtering of the tomographic image data, so that a pseudo three-dimensional reprojected image is obtained.
Claims4
An image information processing apparatus comprising:
- tomographic image forming unit for forming continuous tomographic image data;
- two-dimensional image memory means for storing the continuous tomographic image data formed by said tomographic image forming unit;
- two-dimensional image adding means for adding the continuous tomographic image data in an image reprojection direction while offsetting the tomographic images stored in the two-dimensional image memory means;
- two-dimensional space filtering means for performing space filtering of spaces between the continuous tomographic image data added by said two-dimensional image adding means to interpolate the spaces;
- and
- two-dimensional affine transforming means for performing two-dimensional affine transformation of an interpolated image obtained in said two-dimensional space filtering means to obtain a compressed reprojected image;
- wherein said two-dimensional image adding means include:
- means for judging whether an indicated reprojecting direction is perpendicular to a slice plane of the tomographic image;
- and
- means for adding values at corresponding addresses of all successive tomographic images stored in said image memory means.
An image information processing apparatus comprising:
- a control computer means for controlling an operation of the image information processing apparatus;
- a system bus connected to the control computer means;
- tomographic image forming unit connected to the system bus for forming continuous tomographic images data;
- two-dimensional image memory means connected to the system bus for storing the continuous tomographic images data formed by said tomographic image forming unit;
- two-dimensional image adding processor connected to said system bus for adding the continuous tomographic images data in an image reprojection direction while offsetting the tomographic images stored in the two-dimensional image memory means under control of said control computer means;
- two-dimensional space filtering processor connected to said system bus for performing space filtering of dataless spaces between the continuous tomographic images added by said two-dimensional image adding processor to interpolate the spaces under control of said control computer means;
- and
- two-dimensional affine transforming processor connected to said system bus for performing two-dimensional affine transformation of an interpolated image obtained in said two-dimensional space filtering processor to obtain a compressed reprojected image.
Dependencies are inferred from the claim text.