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US 2016/0078606 A1Published application
Super-Resolution Apparatus and Method
AssigneeKorea Advanced Institute of Science and Technology
InventorsJong Beom Ra, Il Jun Ahn, Ji Hye Kim, Yong Jin Chang
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Abstract
An image-based super-resolution method using a cone-beam-based line-of-response (LOR) reconfiguration in a positron emission tomography (PET) image is provided. That is, an apparatus and method for reconfiguring a super-resolution PET image using a cone-beam-based LOR reconfiguration is provided.
Claims15
An apparatus for reconfiguring an image using a cone-beam based line-of-response (LOR) reconfiguration, the apparatus comprising:
- a blur model maker configured to model a blur by generating a point spread function (PSF) kernel corresponding to each location of an image system;
- an LOR acquirer configured to acquire an LOR and a sinogram corresponding to each location by detecting a motion due to respiration of subject;
- a cone-beam sinogram converter configured to convert, to a sinogram format in a cone-beam shape, an LOR-based sinogram acquired by the LOR acquirer;
- a sinogram model maker configured to model the sinogram format-converted to the cone-beam shape by the cone-beam sinogram converter;
- and
- a high-resolution image inducer configured to induce a high-resolution image using the sinogram modeled by the sinogram model maker.
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A method of interpolating a point spread function (PSF) using a non-rigid registration in a medical image, the method comprising:
- measuring a PSF sinogram with respect to at least one voxel location among a plurality of voxel locations of a medical imaging system by performing a Monte-Carlo simulation based on symmetry of the medical imaging system;
- imaging the measured PSF sinogram using a predetermined image reconfiguration;
- acquiring a deformation field by performing a non-rigid registration on the imaged PSF;
- and
- interpolating the PSF with respect to remaining voxel locations excluding the at least one voxel location from among the plurality of voxel locations of the medical imaging system, using the acquired deformation field.
2 more elements
Dependencies are inferred from the claim text.