Patent ID: 11935160
Assignee: AGFA NV
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method of generating a tomographic image of an object comprising:
acquiring a set of digital projection image data ‘b’ of the object, wherein the set of digital projection image data ‘b’ has a low image quality for at least one image quality aspect, and
applying an iterative reconstruction algorithm to the set of digital projection image data ‘b’ to generate an enhanced tomographic image, wherein the iterative reconstruction algorithm includes a plurality of iteration steps starting from an initial guess, and wherein the applying comprises:
comparing the digital projection image data ‘b’ to a forward-projection of a result of a previous iteration step to produce a comparison;
subjecting the comparison to a neural network for enhancement thereof, wherein the neural network is trained in advance with a high quality comparison and a low quality comparison for the at least one image quality aspect; and
applying a back-projection to the enhanced comparison to correct the result of the previous iteration step, and

comparing a first set of projection images with a projection of the tomographic image to obtain the high quality comparison and comparing a second set of projection images with said projection of the tomographic image to obtain the low quality comparison,
wherein the first set of projection images is of higher quality with respect to said image quality aspect than the second set of projection images, and
wherein said first set of projection images comprises at least one projection image from a different image location in the object than the image location in the object of the projection images of the second set of projection images.