Radiographic apparatus
AssigneeShimadzu Corporation
InventorsEiichi Morita, Yoshihiro Ueno
Life of this patent
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Abstract
A driver drives an X-ray tube and a flat panel X-ray detector synchronously to scan sectional planes to be imaged of an object under examination. A back projection unit projects projection data detected in varied scan positions to predetermined lattice points of a three-dimensional lattice virtually set to the region of interest of the object radiographed. An image reconstruction is carried out to generate three-dimensional volume data of the region of interest. The three-dimensional volume data of the region of interest is generated quickly without repeating a radiographic operation.
Claims20
A radiographic apparatus for obtaining images of sectional planes in a region of interest of an object under examination by an image reconstruction using projection data acquired by radiographing the object from varied scan positions, said apparatus comprising:
- a radiation source for irradiating said object with penetrating electromagnetic waves;
- an area detector opposed to said radiation source across said object for detecting electromagnetic waves transmitted through said object;
- scanning means for synchronously moving said radiation source and said area detector for scanning action;
- and
- a back projection unit for performing an image reconstruction to generate three-dimensional volume data of the region of interest by projecting projection data detected in the varied scan positions back to predetermined lattice points of a three-dimensional lattice virtually set to the region of interest of the object radiographed.
A radiographic apparatus for obtaining images of sectional planes in a region of interest of an object under examination by an image reconstruction using projection data acquired by radiographing the object from varied scan positions, said apparatus comprising:
- a radiation source for irradiating said object with penetrating electromagnetic waves in form of a divergent beam;
- an area detector opposed to said radiation source across said object for detecting electromagnetic waves transmitted through said object;
- scanning means for setting two non-orbital tracks opposed to each other across the object, moving said radiation source along one of said non-orbital tracks, and moving said area detector in synchronism therewith along the other non-orbital track;
- a convolution unit for performing a convolution process on the projection data detected in the varied scan positions;
- and
- a back projection unit for performing the image reconstruction to generate three-dimensional volume data of the region of interest by projecting the projection data convoluted by said convolution unit back to predetermined lattice points of a three-dimensional lattice virtually set to the region of interest of the object radiographed.
Dependencies are inferred from the claim text.