Patent ID: 11911199
Assignee: OUR UNITED CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A medical imaging apparatus, comprising: an imaging source, a beam stop array and a detector; wherein,
the beam stop array is arranged between the imaging source and the detector, the imaging source and the detector are disposed on a gantry, to rotate around a rotation axis as the gantry rotates around the rotation axis; and
the beam stop array includes a plurality of stop elements, the plurality of stop elements are distributed in rows in a direction perpendicular to the rotation axis, and a number of the stop elements in each row is less than a preset number, the preset number being a number of intersections of straight lines passing through the plurality of stop elements in a direction of the rotation axis with a plane perpendicular to the rotation axis;
wherein the medical imaging apparatus further comprises a processor, and the processor is electrically connected to the detector;
the detector is configured to image when rays are blocked by the beam stop array to obtain a plurality of projections, each of the projections comprises a plurality of shadow area corresponding to the plurality of stop elements;
the processor is configured to estimate a scattering distribution in the projections, remove estimated scattering in the projections, and use a plurality of projections with the estimated scattering removed for image reconstruction to obtain a plurality of slice images, wherein a plurality of shadow areas corresponding to the plurality of stop elements are distributed in the plurality of slice images, and a number of the shadow areas in each slice image is less than the preset number.